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Chapter 1 Overview of Forensic Science Flashcards

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7325129871DNA fingerprinting was developed by Rosalind Franklin, James Watson, and Francis CrickFalse0
7325132673Forensic scientists often specialize in a field such as firearmsTrue1
7325134457Only substantial amounts of physical evidence can help investigators solve crimesFalse2
7325140503The chain of custody is the list of all the people who came into contact with an item of evidence.True3
7325144792The first act of the first authorized personnel on a crime scene is to begin to collect evidenceFalse4
7325150578If no nuclear DNA is present in a hair sample, investigators:cannot link the hair to any one person5
7325154474A spiral search method would be used in:a state park.6
7325158581An example of testimonial evidence is:witness statements7
7325163638Locard's exchange principle states thatwhenever two pieces of evidence come in contact, material will be exchanged8
7325167490The scientific method includesAll of these choices.9
7325174075The first step in investigating a crime is tosecure the crime scene.10
7325176276The point at which a judge determines whether or not there is enough evidence to take a case to trial is called thepreliminary hearing.11
7325183016Evidence is collected and packaged properly so that a crime scene technician can identify and comparephysical evidence.12
7325187277Evidence collected at a crime scene is sent to:the crime lab13
7325193157The requirement that evidence presented at a trial must be generally accepted in the scientific community is known as theFrye Standard.14
7325197262Evidence that exhibits individual characteristics includesall the above15
7325201607Forensic science draws on:All of these choices16
7325206169An example of evidence with class characteristics is:carpet fibers.17
7325209242A jury will be presented withphysical and circumstantial evidence and testimony from witnesses18
7325213839Forensic science is:the application of science to law.19

Forensic Science: Drugs & Toxicology Flashcards

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9555772813Narcotics, examplesheroin, codeine, methadone, oxycodone0
9555772814Hallucinogens, examplesmarijuana, PCP, LSD1
9555772815Depressants, examplesAlcohol, Barbiturates, Anti-psychotics, Anti-anxiety,2
9555772816Stimulants, examplesCocaine, crack, methamphetamines3
9555772817Schedule Ino medical use high potential for abuse (heroin, LSD, Peyote, MDMA "ecstasy", bath salts4
9555772818Schedule IIseverely restricted for medical use high potential for abuse (cocaine, methamphetamine, methadone, oxycodone)5
9555772819Schedule IIIaccepted medical use moderate potential for abuse moderate to low risk of dependence (Barbiturates, steroids, ketamine)6
9555772820Schedule IVmedical use low potential for abuse and risk of dependency (xanax, valium, sleeping pills, tranquilizers)7
9555772821Schedule Vmedical purpose low potential for abuse contains limited quantities of narcotics (robitussin, Tylenol with codeine)8
9555772822presumptive testingcolor testing & microcrystalline testing9
9555772823Hallucinogens def- affect perception, thinking, self awareness, and emotions - flashbacks may occur long after the drugs wear off10
9555772824Narcotics def- addictive, sleep inducing drugs that act as central nervous system depressants and suppress pain - highly addictive11
9555772825Stimulants def- stimulate central nervous system - increase energy and alertness while decreasing appetite12
9555772826Depressants def- depress the CNS - relieve anxiety and produce sleep13
9555772827Malthus OrfilaWrote famous book on Drugs and Poisons "Father of Toxicology"14
9555772828PoisonAny substance taken in sufficient quantity to cause adverse reaction or death15
9555772829True PoisonA poison that requires a very small amount to produce adverse effects or death16
9555772830Concentration categoriesnormal, therapeutic, toxic, lethal17
9555772831LD50Lethal dose that will kill half of a population18
9555772832Familiar PoisonsCyanide, strychnine, heavy metals (arsenic, lead)19
9555772836Drug DependenceTwo types: physical and psychological20
9555772837Psychological Dependenceunderlies all drug use - produce such a good feeling that you want to continue to get that feeling - fear of withdrawal symptoms of anxiety stop the user from not using them21
9555772838Physical DependenceThere are physical factors involved - stop using the drug can cause nausea, body chills, cramps, etc - fear of these cause continued use or relapse22
9555772839Classes of DrugsNarcotics, Hallucinogens, Depressants, Stimulants, Anabolic Steroids,23
9555772840Effects of NarcoticsRelieve pain, produces sleep, euphoria feeling, sedative and depresses vital body function24
9555772841Opiates defPain-killer - comes from the gummy white substance of a poppy plant that exist in Asia or South America - that is what is used to create morphine or heroin25
9555772842Heroin defMost common opiate - created by reacting morphine with acetyl chloride - analgelsic26
9555772843Effects of HeroinProduces a high / sense of well-being and is a pain reliever - heroin becomes morphine in the brain but gets their quicker - last for 3-4 hours27
9555772844EndorphinsReward the central reward circuit and causes a release of dopamine28
9555772845Marijuana defCanabis Sative plant - contains the chemical THC which produces effects - highest concentration of it is found in the hashish which is a resin on the plant29
9555772846Effects of Marijuanaabsorbed quickly and results in excess dopamine production No physical dependence - but psychological30
9555772847Effects of LSDCreates mood change, unexpected laughing or crying, hallucinations, visual/auditory disruption31
9555772848Effects of DepressantsSlows the central nervous system32
9555772849AlcoholMost widely used drug in the western world Travels to the brain and supresses control of thoughts and muscles33
9555772850BarbituratesDowner - relaxes user Many medical uses Take it orally - enters through intestines or stomach34
9555772851HuffingSniffing material containing volatile solvents - causes extreme damage to brain and liver Freon (airplane glue) - most popular Creates euphoria with impaired speech and vision35
9555772852Effects of AmphetaminesEuphoria or well-being, no sense of appetite and no fatigue - used for weight loss and ADD medication36
9555772853Cocaine, defExtracted from coca plant Ingest through either snort or injection Stops the re-uptake of dopamine causing stimulation37
9555772854Crack, defSolid form of cocaine - created by mixing it with baking soda and water Smoke crack - gets to brain the fastest38
9555772855GHB/RoofieDepressant - accompanied by sexual assault - drug is odorless and colorless Effects - dizzy, unconcious, nausea, no memory39
9555772856Ecstasy, defHallucinogen - Club Drub-mind-altering and creates euphoria and happiness and relaxation40
9555772857Anabolic Steroidssynthetic to stimulate testosterone - two effects: 1. muscle growth 2. male traits41
9555772858Schedule Ihigh potential for abuse, no medical use and lack of safety LSD, heroin, marijuana, ecstasy42
9555772859Schedule IIhigh potential for abuse, some medical purpose and high dependence Opioids, cocaine, methadone, PCP, amphetamines, barbiturates, marijuana43
9555772860Schedule IIILess abuse, some medical purpose, and less chance of dependence physically, but high psychologically barbiturates, codeine, steroids44
9555772861Schedule IVLow potential for abuse, medical use and low chances for dependence45
9555772862Schedule VLow potential for abuse, medical use and limited chance for dependence46
9555772863Forensic Drug AnalysisTwo parts: screening and confirmation47
9555772864Color TestDrug turns a specific color when in reaction with a certain reagent - this is only useful for screening because not conclusive for results48
9555772865Microcrystalline testMore specific than color but not definitive Chemical reagent is added creates a crystalline percipitate - size and shape are unique to each drug Quick49
9555772866ChromatographySeparating and identifying different components of a mixture as the basis for a test50
9555772867Infrared SpectrophotometryInfrared - this is absolute and is like a fingerprint for a substance - produces a complex pattern of the spectrum that can be used51
9555772868Toxicologydetecting and isolating drugs or poisons to determine their effect on people Mainly deal with alcohol because that is the most widely consumed drug in the western world52
9555772869Toxicology of AlcoholKnowing how the body metabolizes and deals with alcohol is important for determining its effects, how to identify it and tools53
9555772870Elimination of alcohol or toxinsTwo ways: oxidation and excretion54
9555772871Oxidation of alcoholTakes place in the liver - combination of oxygen and enzyme that is converted in carbon dioxide and water - most alcohol goes this way55
9555772872Excretion of alcoholleaves the body unchanged through breath, sweat or urine - burn off rate varies about is about .015 w/v/hr56
9555772873Field Sobriety Tests1. Psychological test - horizontal gaze/pen light to determine if eye jerk and walk and turn/one-leg stand 2. Breath test - oxidizes alcohol in breath to create electricity57
9555772874Collection and Preservation of Blood1. Drawn under medical conditions, disinfectant, sterile needles 2. Seal airtight with coagulant (stop clotting) and preservatives (stop bacteria from altering alcohol)58
9555772875Blood-Alcohol Lawsinitially recommended BAC of .15, but realized too high so dropped it to .08 (.08 = five times more likely to get into accident)59
9555772876Constitutional IssuesFifth Amendment - self incrimination - you can refused the test, but that is implied consent and you lose your License for period of time.60
9555772877Confirmation TestsGC and MS Infrared Spectrophotometry61
9555772833Effects of Ecstasy- creates sense of empathy and insightfulness Induces the production of serotonin Increases body temperature, nausea and anxiety Often leads to seizures, muscle breakdown, kidney and liver failure, serious damage to your brain that controls memory62
9555772834Effects of CocaineHigh productivity, euphoria and loss of appetite - stimulates pleasure center at base of brain Deaths due to cardiac and respiratory arrest63
9555772835Effects of CrackEuphoria but fades quickly, after 15 seconds therefore creates extreme addiction - hard to overcome64

Forensic Science Flashcards

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10108360061AutopsyThe internal and external examination of a body after death. An autopsy is performed to confirm or determine the cause of death and establish other pre-death conditions, such as the type of food last consumed and the time it was consumed.0
10108360062BallisticsThe study of the motion of bullets and their examination for distinctive characteristics after being fired. Examiners can use this evidence to match bullets or bullet fragments to specific weapons.1
10108360063Blood SplatterThe pattern of blood that has struck a surface. This pattern can provide vital information about the source of the blood. Can help determine the size and type of wound, the direction and the speed with which the perpetrator or victim was moving, and the type of weapon used to create the blood spill.2
10108360066CriminologyThe study of criminal activity and how it is dealt with by the law.3
10108360067DNADeoxyribonucleic acid. Double helix strand. Genetic code (fingerprint). 50% from mom and 50% from dad. ACGT.4
10108360070EvidenceAnything that has been used, left, removed, altered, or contaminated during the commission of a crime or other event under investigation5
10108360071FingerprintThe unique patterns created by skin ridges found on the palm sides of fingers and thumbs.6
10108360072Forensic ScienceThe application of science to law. The application of science to those criminal and civil laws that are enforced by police agencies in a criminal justice system. The focus of forensics is the crime lab. The crime lab uses the principles and technique of biology, chemistry, physics, geology, anthropology, and other sciences in order to place physical evidence into a professional discipline.7
10108360074GeneA unit of inheritance consisting of a sequence of DNA that determines a particular characteristic in an organism.8
10108360077Lie DetectorA machine that charts how respiration and other bodily functions change as questions are asked of the person being tested. Also known as a polygraph. An attempt to knowingly provide false answers can cause changes in bodily functions.9
10108360078LuminolA chemical that is capable of detecting bloodstains diluted up to 10,000 times. Is used to identify blood that has been removed from a given area.10
10108360079Physical EvidenceAny object that can help explain an event under investigation, Can establish that a crime has been committed, and Sometimes can provide a link between a crime and its victim or between a crime and its perpetrator.11
10108360081SerologyA technology dealing with the properties and actions of serums in blood12
10108360083ToxicologyThe study of poisons and drugs and their effect on human and animal populations. It is the study of symptoms, mechanisms, treatments and detection of poisoning, especially the poisoning of people.13
10108360084Trace EvidenceMaterial deposited at a crime or accident scene that can only be detected through a deliberate processing procedure. An individual entering any environment will deposit traces of his or her presence, and this material can be used as evidence. Examples- hairs and fibers14
10108360086Locard's Exchange PrincipleDr Edmund Locard, a French police officer and forensic scientist. Any physical contact between a suspect and victim will result in physical evidence being exchanged between them.15
10108360087Mass SpectrometryA technique used by toxicologist to identify chemical compositions. The instrument breaks a chemical down into its ions and accelerates them in a magnetic field that produces a unique spectrum.16
10108360088Mitochrondrial DNA (mtDNA)Used to trace ancestry. Type of DNA located in the mitochondrion of most cells. Last longer than nuclear DNA. Only comes from the mother17
10108360090Modus Operandi (MO)The usual method of operation used by a perpetrator. Particular weapon used or taking "trophy" items from victims18
10108360091Professional WitnessA professional person who testifies at a trial. Police officer or security guard19
10108360093Reconstruction of a crimeDetermining the way a crime happened, pieced together using evidence at the crime scene.20
10108360094Antemortem"Before death"21
10108360095PerimortemAt or around the time of death22
10108360096Postmortem"After death"23
10108360098SuspectAn individual who might possibly have committed the crime under investigation. Guilt is presumed or has been proven24
10108360099CoronerPublic official who is responsible for investigating any death that may not have had a natural cause25
10108360100Medical ExaminerTrained medical practitioner who devotes some or all of their time to forensic work26
10108360101OdontologyForensic dentistry, The examination of bile marks and dental identification of corpses.27
10108360102PathologyThe study of the causes and consequences of disease and injury in relation to crime and the law28
10108360104AFISAutomated Fingerprint Identification System. Scans fingerprints electronically and plots the positions of their ridge characteristics, comparing them with prints in a database.29
10108360111Chain of CustodyA list that records every official person who handles a piece of evidence. Those in the chain put their initials and the date on the evidence container.30
10108360112CODISCombined DNA Index System (FBI). Used to share DNA profiles kept in the FBI's National DNA Index System (NDIS) with law enforcement bodies.31
10108360113Cold CaseAn old unsolved criminal case. Many are now being solved with the advent of DNA test.32
10108360115ContaminationThe act of ruining evidence by accidentally depositing outside trace evidence, including DNA, on items from a crime scene or suspect.33
10108360117CPRFirst aid method of cardio-pulmonary resuscitation. Mouth-to-mouth resuscitation is combined with chest compressions.34
10108360118Expert WitnessA specialist witness, such as a forensic scientist, who testifies at a trial.35
10108360121FractureA break, crack, or shattering of a bone36
10108360124IAFISIntegrated Automated Fingerprint Identification System (FBI's). Police forces can submit samples to be compared to those on this computerized database37
10108360129DOA"Dead on arrival"38
10108360132Rigor MortisA stiffening of the body that occurs about 30 minutes after death and continues for up to 18 hours.39
10108360133Livor mortisA coloration of the skin of the lower parts of a corpse caused by the settling of the red blood cells as the blood ceases to circulate40
10108360134Algor MortisThe postmortem cooling of the body.41
10108360137Gunshot residueUnburned primer powder sprayed on to the hands of someone firing a gun, and possibly on to the target42
10108360141TraumaA wound or a physical or emotional shock to the body43
10108360143Manner of DeathLegal classification of how someone died determined by the coroner. Suicide, natural, accidental, or homicide44
10108360144AccelerantFuel used to make a deliberately set fire burn more vigorously45
10108360145Cause of deathThe action that resulted in death, a blow to the head or brain hemorrhage46
10108360146Class EvidenceEvidence that is specific enough to identify overall characteristics but too general for a unique identification47
10108360147CriminalisticsThe examination of physical evidence.48
10108360148EntomologyThe study of insects.49

Forensic Science Flashcards

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10108360061AutopsyThe internal and external examination of a body after death. An autopsy is performed to confirm or determine the cause of death and establish other pre-death conditions, such as the type of food last consumed and the time it was consumed.0
10108360062BallisticsThe study of the motion of bullets and their examination for distinctive characteristics after being fired. Examiners can use this evidence to match bullets or bullet fragments to specific weapons.1
10108360063Blood SplatterThe pattern of blood that has struck a surface. This pattern can provide vital information about the source of the blood. Can help determine the size and type of wound, the direction and the speed with which the perpetrator or victim was moving, and the type of weapon used to create the blood spill.2
10108360066CriminologyThe study of criminal activity and how it is dealt with by the law.3
10108360067DNADeoxyribonucleic acid. Double helix strand. Genetic code (fingerprint). 50% from mom and 50% from dad. ACGT.4
10108360070EvidenceAnything that has been used, left, removed, altered, or contaminated during the commission of a crime or other event under investigation5
10108360071FingerprintThe unique patterns created by skin ridges found on the palm sides of fingers and thumbs.6
10108360072Forensic ScienceThe application of science to law. The application of science to those criminal and civil laws that are enforced by police agencies in a criminal justice system. The focus of forensics is the crime lab. The crime lab uses the principles and technique of biology, chemistry, physics, geology, anthropology, and other sciences in order to place physical evidence into a professional discipline.7
10108360074GeneA unit of inheritance consisting of a sequence of DNA that determines a particular characteristic in an organism.8
10108360077Lie DetectorA machine that charts how respiration and other bodily functions change as questions are asked of the person being tested. Also known as a polygraph. An attempt to knowingly provide false answers can cause changes in bodily functions.9
10108360078LuminolA chemical that is capable of detecting bloodstains diluted up to 10,000 times. Is used to identify blood that has been removed from a given area.10
10108360079Physical EvidenceAny object that can help explain an event under investigation, Can establish that a crime has been committed, and Sometimes can provide a link between a crime and its victim or between a crime and its perpetrator.11
10108360081SerologyA technology dealing with the properties and actions of serums in blood12
10108360083ToxicologyThe study of poisons and drugs and their effect on human and animal populations. It is the study of symptoms, mechanisms, treatments and detection of poisoning, especially the poisoning of people.13
10108360084Trace EvidenceMaterial deposited at a crime or accident scene that can only be detected through a deliberate processing procedure. An individual entering any environment will deposit traces of his or her presence, and this material can be used as evidence. Examples- hairs and fibers14
10108360086Locard's Exchange PrincipleDr Edmund Locard, a French police officer and forensic scientist. Any physical contact between a suspect and victim will result in physical evidence being exchanged between them.15
10108360087Mass SpectrometryA technique used by toxicologist to identify chemical compositions. The instrument breaks a chemical down into its ions and accelerates them in a magnetic field that produces a unique spectrum.16
10108360088Mitochrondrial DNA (mtDNA)Used to trace ancestry. Type of DNA located in the mitochondrion of most cells. Last longer than nuclear DNA. Only comes from the mother17
10108360090Modus Operandi (MO)The usual method of operation used by a perpetrator. Particular weapon used or taking "trophy" items from victims18
10108360091Professional WitnessA professional person who testifies at a trial. Police officer or security guard19
10108360093Reconstruction of a crimeDetermining the way a crime happened, pieced together using evidence at the crime scene.20
10108360094Antemortem"Before death"21
10108360095PerimortemAt or around the time of death22
10108360096Postmortem"After death"23
10108360098SuspectAn individual who might possibly have committed the crime under investigation. Guilt is presumed or has been proven24
10108360099CoronerPublic official who is responsible for investigating any death that may not have had a natural cause25
10108360100Medical ExaminerTrained medical practitioner who devotes some or all of their time to forensic work26
10108360101OdontologyForensic dentistry, The examination of bile marks and dental identification of corpses.27
10108360102PathologyThe study of the causes and consequences of disease and injury in relation to crime and the law28
10108360104AFISAutomated Fingerprint Identification System. Scans fingerprints electronically and plots the positions of their ridge characteristics, comparing them with prints in a database.29
10108360111Chain of CustodyA list that records every official person who handles a piece of evidence. Those in the chain put their initials and the date on the evidence container.30
10108360112CODISCombined DNA Index System (FBI). Used to share DNA profiles kept in the FBI's National DNA Index System (NDIS) with law enforcement bodies.31
10108360113Cold CaseAn old unsolved criminal case. Many are now being solved with the advent of DNA test.32
10108360115ContaminationThe act of ruining evidence by accidentally depositing outside trace evidence, including DNA, on items from a crime scene or suspect.33
10108360117CPRFirst aid method of cardio-pulmonary resuscitation. Mouth-to-mouth resuscitation is combined with chest compressions.34
10108360118Expert WitnessA specialist witness, such as a forensic scientist, who testifies at a trial.35
10108360121FractureA break, crack, or shattering of a bone36
10108360124IAFISIntegrated Automated Fingerprint Identification System (FBI's). Police forces can submit samples to be compared to those on this computerized database37
10108360129DOA"Dead on arrival"38
10108360132Rigor MortisA stiffening of the body that occurs about 30 minutes after death and continues for up to 18 hours.39
10108360133Livor mortisA coloration of the skin of the lower parts of a corpse caused by the settling of the red blood cells as the blood ceases to circulate40
10108360134Algor MortisThe postmortem cooling of the body.41
10108360137Gunshot residueUnburned primer powder sprayed on to the hands of someone firing a gun, and possibly on to the target42
10108360141TraumaA wound or a physical or emotional shock to the body43
10108360143Manner of DeathLegal classification of how someone died determined by the coroner. Suicide, natural, accidental, or homicide44
10108360144AccelerantFuel used to make a deliberately set fire burn more vigorously45
10108360145Cause of deathThe action that resulted in death, a blow to the head or brain hemorrhage46
10108360146Class EvidenceEvidence that is specific enough to identify overall characteristics but too general for a unique identification47
10108360147CriminalisticsThe examination of physical evidence.48
10108360148EntomologyThe study of insects.49

Forensic Science Flashcards

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12515954498Forensic Sciencethe applications to matters of science to law -As well as. . . The business of providing timely, accurate, and thorough information to all levels of decisions makers in our criminal justice system.0
12515954499Criminalisticsthe scientific examination of physical evidence for legal purposes This term is synomous with forensic science1
12515954500Criminologyincludes the physcological angle, studying the crime scene for motive, traits, and behavior that will help to interpret the evidence2
12515954501Divisions of Crime Lab**Physical Science Unit -chemistry -physics **Geology **Biology Unit(DNA) **Firearms Unit(tool mark) **Document Examination Unit **Photography Unit3
12515954502Edmond Locard**French professor **Considered the father of: criminalistics( understood the importance of nature in crime scenes and other cases.) **Built the world's first forensic laboratory in France in 1910 Exchange Principle Whenever two objects come into contact with each other, traces of each are exchanged.4
12515954503Mathieu OrfilaFather of: toxicology, spainish medical proffessor who developed a test for identifying arsenic in the body5
12515954504Alphonse BertillonFather of: criminal identification6
12515954505Francis GaltonFirst to develop a method of: first to develop a method using fringerprints as a means of identification.4f7
12515954506Dr. Karl LandsteinerAn Austrian physician that identified the A, B, AB, and O blood groups in 1901.8
12515954507Rudolf VirchowA German pathologist who standardized a way to preform autopsies one of two ways still used today. ** His cell theory, ("Omnis cellula e cellula") said that cells arise only from other cells.9
12515954508Eugene Francois VidocqConsidered the father of modern criminal investigation. Perhaps the greatest real life detective. He was a criminal that continually escaped from prison. Eventually, he was asked to lead a group of criminals that helped the police solve crimes. This group became the **Surete** which was the most effective police agency in all of France.10
12515954509scientific method1. Observe a problem 2. Consider a hypothesis or possible solution. 3. Examine, test, and then analyze the evidence. 4. Determine the significance of the evidence. 5. Formulate a theory based on evaluation of the significance of the evidence11
12515954510Recongnitionability to distinguish important evidence from unrelated material(which doesn't belong)12
12515954511Preservationcollection of evidence(properly clothed for the contamtination of other evidence)13
12515954512Identificationuse of scientific testing14
12515954513Classmeasured against those of know standards or controls; If all measurements are equal, then the two samples are considered to have come from the same source or origin.(can you group it?)15
12515954514Individualization-demonstrating that the sample is unique, even among members of the same class.(allows you to indenitfy the one contribuator or person)16
12515954515Interpretationgives meaning to all the information(meaning of the labs)(in the court)17
12515954516Reconstructionthe case events( can be able to put the evidence in chronological order to present the evidence to a jury)(in the court)18
12515954517direct evidenceeyewitness statements, confessions( not always the best because of biased)19
12515954518Circumstantialrequires a indriect judegment or inference about what happened ***Circumstantial evidence is not absolute proof, but does provide a general idea of what happened. It may be more reliable than direct. Circumstantial is used in most cases.20
12515954519Testimonialalso known as direct evidence or Prima Facie evidence( a statement made underoath that may be given)21
12515954520Physicalany object or material that is relevant in a crime22
12515954521Transient Evidencetemporary; easily changed or lost; usually observed by the first officer at the scene23
12515954522Pattern Evidenceproduced by direct contact between a person and an object or between two objects; most are in the form of imprints, indentations, striations, markings fractures or deposits. -skid marks24
12515954523Conditional Evidenceproduced by a specific event or action; important in crime scene reconstruction and in determining the set of circumstances within a particular event **head light25
12515954524Transfer of Evidenceproduced by contact between person(s) or object(s), or between person(s) and object(s)26
12515954525Associative Evidence-items that may associated a victim or suspect with a scene or each other; ie, personal belongings27
12515954526Classcommon group of objects or persons -> blood type28
12515954527Individualcan be identified with a particular person or source(can isolate to one and only source) -> blood dna29
125159545281923 Frye v. United StatesScientific evidence is allowed into the courtroom if it was generallyaccepted by the scientific community. ****The Frye standard does not offer any guidance on reliability30
125159545291993 Daubert v. Dow Admissibility is determined by:***Whether the theory or technique can be tested ***Whether the science has been offered for peer review ***Whether the rate of error is acceptable ***Whether the method at issue enjoys widespread ****acceptence(scientific community-can an indendenat lab concuct the same evidence support in another lab) ***Whether the opinion is relevant to the to the issue31
12515954530probativeactually mean something32
12515954531materialaddress an issue in this particular crime33
12515954532Means—person has the ability to do the crime34
12515954533Motiveperson has a reason to do the crime35
12515954534Opportunityperson had the ability to be at the crime36
12515954535first officer on the sceneA—assess the scene D—detain the witness ask them questions--details to write down A—arrest the perpetrator P—protect the crime scene—take out crime tape and shut of certain areas no matter how large T—take notes—compile data, including presenting any fragile evidence at the scene37
12515954536Medicolegal death investigator-representative from the medical examiner or coroner's office. Responsible for the body.38
12515954537Police investigatorsideally, 5 respond to a scene. Police have jurisdiction of the crime scene.39
12515954538Case Detective-Document the crime scene -Interview the original or reporting patrol officer -Examine crime scene with crime scene investigator (CSI) -Pass on necessary info to assisting detectives40
12515954539Homicide Supervisor-Assign roles to the detectives -Arrange for necessary resources -Keep logs of assignments -Relay into to commanders41
12515954540documentation for the crime scene-notes -photographpy -sketches -videography42
12515954541Link methodBased on the linage theory of Locard; one type of evidence leads to another; experiential, logical and systematic; most common and productive type used43
12515954542Line or strip method-best in large, outdoor scenes44
12515954543Zone method-most effective in houses or buildings; teams are assigned small zones for searching45
12515954544Wheel or ray methodbest on small, circular crime scenes46
12515954545Spiral method-may move inward or outward; best used where there are no physical barriers47
12515954546grid methodbasically a double-line search; effective, but time-consuming48
12515954547Triangulationuses two points at the crime scene to map each piece of evidence49
12515954548Coordinate or grid-divides the crime scene into squares for mapping.50
12515954549Suspended Polar coordinate-coordinate-for use in mapping evidence in a hole51
12515954550Baselineset a north/south line and measures each piece of evidence from this line.52
12515954551Druggist Foldis used with larger pieces of paper folded around larger items to hold trace evidence in place. These are then placed insider other containers such as paper bags, plastic bags, canisters, packets and envelopes depending on the type and size of the evidence.53
12515954552chain of custodyA written record of all people who have had possession of an item of evidence.54
12515954553K-9 programsNarcotics--dogs that find illegal drugs Tracking--dogs that look for a fugitive or suspect that is would be near the crime scene Bomb detection--dogs that look for explosive devices Arson detection--dogs trained to detect various types of accelerants Search and rescue--dogs that look for people who are lost Body detector--dogs used in mass disasters Cadver--dogs trained to detect decomposition Human Remains Specialists--dogs that can detect any human remains.55
12515954554Juan Vucetichan Argentinian police officer, researched the science of fingerprints, corresponded with Galton, then devised his own system of fingerprint classification.56
12515954555Sir Edward HenryHe devised a workable classification system for fingerprints57
12515954556The Bertillon Systemdeveloped the first truly organized system of identifying individuals in 1883. He believed that everyone could be distinguished from one another by key measurements of their body. These measurements became known as berillonage.58
12515954557Thomas JenningsThe first person convicted in the US on fingerprint evidence.59
12515954558Brandon MayfieldA lawyer and convert of Muslim, was held for two weeks before the Spanish investigation revealed that the print instead belonged to Algerian, Ouhnane Daoud.60
12515954559Dactylosocopythe study of fingerprints61
1251595459562
12515954596Fingerprint characteristics63
12515954560Arch fingerprintThey do NOT have type delta or cores64
12515954561arch tented archtented arch65
12515954562Loop fingerprintRadial --opens toward the thumb Ulnar --opens toward the "pinky" (little finger) ***Loops must have one delta or one core**.66
12515954563Plain WhorlThis print has 2 delta's and therefore it is a whorl67
12515954597Double loop whorl68
12515954598accidental whorl69
12515954599Primary Identification Numbers fingerprinting70
12515954564comparisonGenerally, criminal courts will accept 8 to 12 points of similarity.71
12515954565IAFISThe Automated Fingerprint Identification System--a computer system for storing and retrieving fingerprints72
12515954566visible fingerprintsMade by fingers touching a surface after the ridges have been in contact with a colored material such as blood, paint, grease, or ink.73
12515954567Plastic PrintsRidge impressions left on a soft material such as putty, wax, soap, or dust.74
12515954568Latent Printsare those that are "hidden" and are not visible to the naked eye. These prints consist only of the natural secretions of human skin and require treatment to cause them to become visible.75
12515954569Lifting latent printspowders, iodine,Ninhydrin,sliver nitrate, cyanoacrylate76
12515954570powdersadhere to both water and fatty deposits. Choose a color to contrast the background.77
12515954571Iodine--fumes react with oils and fats to produce a temporary yellow brown reaction. Iodine crystals sublime (go directly from solid to vapor).78
12515954572Ninhydrin--reacts with amino acids to produce a purple reaction.(works good with paper and styrofoam and takes a couple days and must be a little moist)79
12515954573Silver nitrateSilver nitrate--react with chlorides to form silver chloride, a material which turns gray when exposed to light.(does a lot of damage and should not be first choice)80
12515954574Cyanoacrylate- "super glue" fumes react with water and other fingerprint constituents to form a hard, whitish deposit.(used on irregular surfaces)81
12515954575palmlines can be identified and may be used against suspects82
12515954576footprintsare taken at birth as a means of identification83
12515954577accidentalsare marks made on the soles of the shoes that would make the print unique84
12515954578biometrics*Use of some type of body metrics for the purpose of identification. --controls entry or access to computers or other structures; identifies persons for security; helps prevent identity theft or controls social services fraud85
12515954579Five Prongs of Daubert-Testability -General Acceptence -General Review -Known or Potential ErrorRate -Maintenance of Standard & Controls86
12515954580testabilityA critical evaluation process that supports or refutes a hypothesis87
12515954581types of handguns-revolvers -pistols88
12515954582types of Shoulder guns-Rifles -Shot Guns89
12515954583toolThe harder of two objects that comes into forceful contact with one another, resulting in the softer object being marked90
12515954584tool markFeatures imparted on an object by the contact and force exerted from a tool. -impressed -striated91
12515954585impressed tool markFeatures produced when a tool contacts an object with enough compressive force that it leaves an impression.92
12515954600Parts of a handgun93
12515954586striated toolmarkFeatures produced when a tool contacts an object with lateral force and motion.94
12515954587caliberCaliber is the diameter of the bullet, specifically the projectile, commonly called the slug.95
12515954588class characteristicsGeneral and/or measurable features of a specimen which indicate a Restricted group source. They result from design factors, and are therefore determined prior to manufacture.96
12515954589Individual CharacteristicsMarks or features produced by the random imperfections or irregularities of tool surfaces. These characteristics can be used to individually associate a tool to a toolmark. -from abuse -wear from use also97
12515954590Range of conclusions for identifying firearms-identification -inconclusive -elimination98
12515954591identificationIf the quality and character of the toolmark have sufficient detail, can be concluded based on the correspondence of individual characteristics99
12515954592inconclusiveIf the quality and character of the toolmark are lacking, an examiner may not be able to make an identification or elimination.100
12515954593elimination-lack of characteristics -If disagreement in individual characteristics of an exceptional nature exists, an elimination conclusion may be the appropriate response.101
12515954594Daubert Decision-is Testable -is Generally Accepted -is Peer Reviewed -has Known Error Rates maintains Standards & Controls102

Forensic Science - History of Forensic Science Flashcards

Terms : Hide Images
10833107988Yi Yu JiDocument explaining a house fire, which ended up being a homicide0
10833115782ArsenicA test was developed in the 1700s to check for this substance in a dead body1
10833133314Mathieu OrfilaThe Father of Forensic Toxicology; studied the effects of various toxins on animals2
10833144833PhotographyThis technology allowed for more efficient documentation of crime scenes3
10833153430MicroscopesThis technology allowed for a better understanding of the cells and tissues of the human anatomy4
10833164569Alphonse BertillonFather of Criminal Investigation; developed the first system of identification5
10833170646Henry GaltonDeveloped the fingerprint method of identification6
10833176411Sir Arthur Conan DoyleCreated the Sherlock Holmes cartoons, popularizing the field of forensic science7
108331855891800sSperm detection was developed during this century8
108331952861600sThe development of forensic science was held back during this century due to limits in technology9
108332043601900sBlood typing was discovered during this century10
10833211503Edmond LocardCreated the first dedicated crime lab11
10833217957Sir Alec JeffreysDiscovered DNA typing12
10833221359ComputersThis technology allowed for expansive databases that could be accessed all over the world13
108332283752000sTV shows like NCIS helped popularize forensic science during this century14

Forensic Science Chapter 6 Fingerprint, Blood Type Flashcards

Terms : Hide Images
9803781549archa fingerprint pattern in which the ridge pattern originates from one side of the print and leaves from the other side0
9803781551deltaa triangular ridge pattern with ridges that go in different directions above and below a triangle1
9803781554loopa fingerprint pattern in which the ridge pattern flows inward and returns in the direction of the origin2
9803781555minutiaethe combination of details in the shapes and positions of ridges in fingerprints that make each unique3
9803781559ten cardform used to record and preserve a person's fingerprints4
9803781560whorla fingerprint pattern that resembles a bull's eye5
9803781561whorl (picture)6
9803781562loop (picture)7
9803781563arch (picture)8
9803781564antigena marker found on blood cells; may indicate native or foreign to body9
9803781565antibodysomething that binds to a specific antigen10
9803781566agglutinationthe clumping of blood cells that occurs when antibodies begin sticking to A, B, or Rh antigens11
9803781567type A+ bloodhas A and Rh antigens12
9803781568type A- bloodhas only A antigens13
9803781569type B+ bloodhas B and Rh antigens14
9803781571Type AB+ bloodproduces no antibodies15
9803781572Type AB- bloodhas only A and B antigens16
9803781573Type O+ bloodhas only Rh antigens17
9803781574Type O- bloodproduces anti-A, anti-B, and anti-Rh18
9803781575Universal donor is...type O- blood19
9803793370Latent fingerprintA fingerprint made by the deposit of oils and/or perspiration; it is (mostly) invisible to the naked eye.20
9803793389Plastic fingerprintA three-dimensional fingerprint made in soft material such as clay, soap, or putty21
9803793390Patent fingerprintA visible fingerprint deposited via a substrate such as blood, grease, or paint.22
9804025969LuminolA chemical that emits a blue glow when it comes in contact with blood, detects hemoglobin23
9804025970Kastle-MeyerChemical test used to determine the presence of blood; swab turns pink if blood is detected, detects iron24
9804025971Precipitin testTest used to determine if blood is human or non-human25
9804036845Spine blood26
9804036846SatelliteSmall blood droplet formed when blood overcomes cohession27
9804102080PassiveBlood that drops due to the force of gravity alone28
9804102081TranferBlood stain made when blood is picked up and moved to another location by an object29
9804102082SpatterBlood stain made w/ a force additional to gravity30
9804131233TailPart of a blood droplet that is formed when blood is in motion when deposted31
9804141325BifurcationFork or branching of fingerprint ridges.32

Documents - Forensic Science Flashcards

Terms : Hide Images
7972062455Examples of Questioned Documentsrare books, letters, checks, contracts, lottery tickets0
7972080481Drugs and alcohol can make handwritingless recognizable1
7972125262Handwriting becomes individualized whena person has matured (adult)2
7972160476Situations that can alter handwritingtype of paper, type of writing utensil, posture3
7972251227Which of the following are easier to find individual characteristics: typewritten documents or documents from personal/business computers?typewritten documents are easier to find individual characteristics4
7972258902Infrared RadiationUsed to uncover original writing of words that have been crossed out.5
7972308620Steps to take when obtaining handwriting samples1. Use similar pen and paper 2. Use similar letters and groups of words 3. Dictate the contents at least 3 times6
7972332303Steps to take when preparing standards from a typewriter1. prepare a copy of the full text word for word 2. examine impressions on ribbon 3. Type characters without ribbon 4. Light, medium and heavy touches7
7972392720Thin-Layer ChromatographyDetermines the chemical composition of ink8
7972403538Indented Writingpartially visible impressions on a sheet of paper9
7972415371Critical to the examination of questioned documents is thepreservation of the questioned document in its original form10
7972426102If the questioned document was written at age 25 and the exemplar was from age 12, will there be a difference in the handwriting?yes, age can alter the handwriting of a person.11
7972743569Two types of exemplars1. Collected - written prior to investigation 2. Requested - dictated by the investigator12
7972794173Questioned DocumentA document in which its entirety or in part is subject to question as to its authenticity and/or origin13
7972798138Dreyfus Affair CaseSet back to document analysis discipline - wrongly accused.14
7972809502Albert OsbornAmerican handwriting expert. Wrote the book Questioned Documents15
7972814438Graphologistprofiles character or personality by drawing conclusions from certain types of characteristics in handwriting sample16
7972823254Question Document Examinerapplies scientific approaches to the whole document in order to recognize source or evidence of authenticity17
7972835044Individual Characteristicsslant, form, speed, pen lifts, spelling, embellishments18
7972904553Exemplarhandwriting used as a standard for comparison with document in question.19
7972918514Erasures can be identified by using amicroscope20
7972935393Electrostatic Detection Apparatusdetected indented writing21

Forensic Science - Hair and Fibers Flashcards

Terms : Hide Images
8264152556The three parts of the hairCuticle, cortex, medulla0
8264163070The cortex is made of _________________Keratin1
8264194824A row of cells running along the center of the cortex like a canalMedulla2
8264201526The four types of the medullaAbsent, continuous, interrupted and fragmented3
8264285546The ratio of the diameter of the medulla to the diameter of the entire hairMedullary Index4
8264297894The average rate of growth for human hair1 cm per month5
8264310448The three stages of human hair growthAnagen, catagen, and telogen6
8264376125Examples of hair configurationsStraight, curly, kinky7
8264384170Examples of hair tipsCut, split, frayed, rounded, pointed8
8264421827The purposes of hairInsulation to protect us from extreme temperatures and harmful sun rays.9
8264447787The average person has _______________ scalp hairs.100,00010
8264460867Can be found in the hair root.Nuclear DNA11
8264465406Can be found in the hair shaftMitochondrial DNA12
8264482304The outermost component of the hair shaftCuticle13
8264544589Embedded within the cortex and responsible for hair colorationPigment granules14
8264553789If your pigment granules are absent your hair color would beGray or white15
8264565832The basic element of any fabricFiber16
8264573205Wool comes fromSheep and goats17
8264579929The two main categories of fibersNatural or synthetic18
8264591763Fibers which are typically short and fineNatural19
8264604440Fibers which are man-madeSynthetic20
8264621947Fabrics are composed of individual threads which are ________________, __________________, or ______________ together.Knitted, woven or laced21
8264640766Fabrics which are woven with interlocking loopsKnitted22
8264646466Have warp and weft threadsWoven23
8264737471The three types of weave patternsPlain, twill and satin24
8264820494Has a diagonal float patternTwill weave25
8264845233Produce over under ratios such as 3/1, 4/1, 5/1, 8/1, etc.Satin weave26
8264859483Numerous fibers which are twisted togetherYarn27
8264874826Run the length of the fabricWarp threads28
8264882167Cross over and under the warp threadsWeft threads29
8264924025Hairs and fabric are ______________________ evidence.Class30
8264948445Hair is produced from a structure called the ______Follicle31
8264960693Hair _____ and _____ is influenced heavily by genes.Shape, texture32
8264975060In order to test hair for DNA, the _______ must be present.Root33
8264987970Protein-rich structure around the medulla that contains pigmentCortex34
8264997070The structure of hair has been compared to that if a ________.Pencil35
8265022650Characteristics of the cuticle may be important in distinguishing between hairs of different _______ but are often not useful in distinguishing between different _________.Species, people36
8265052075The cortex varies in _________, _________ and __________.Thickness, texture, color37
8265068305The most important component in determining from which individual a human hair may have come.Distribution of the cortex38
8265080491The medulla may vary in ______, _______, and ________.Thickness, continuity, opacity39
8265114146The discovery of ___________ and multiple fiber transfers between the suspect's clothing and the victim's clothing dramatically increase the likelihood that these two individuals had physical contact.Cross transfer40
8265129240Examples of natural fibersCotton and wool41
8265135752Examples of synthetic fibersNylon, rayon and polyester42

Forensic Science CH. 1 Flashcards

Terms : Hide Images
7673221856Mathieu OrfilaThe father of forensic toxicology0
7673227838Alphonse BertillionDevised the first scientific system of personal identification in 18791
7673246260Francis GaltonConducted the first definitive study of fingerprint and their classification2
7673262349Leone LattesDeveloped a procedure to determine blood type from dried blood stains3
7673271048Calvin GoddardUsed a comparison microscope to determine if a particular gun fired a bullet4
7673285434Walter McCroneUtilized microscopy and other analytical methodologies to examine evidence5
7673295068Hans GrossWrote the first treatise describing the application of scientific principals to the field of criminal investigation6
7673306967Edmond LocardIncorporated Gross' principals within a workable crime labratory7
7673311847Locards Exchange PrincipalStates that when a criminal comes in contact with an object or person, a cross-transfer of evidence occurs8
7673346321Reason for increasing number of crime labs1. Supreme court decisions in the 1960's are responsible for police placing greater emphasis on scientifically evaluated evidence 2. The advent of DNA profiling 3. Crime labs inundated with drug specimens due to accelerated drug abuse9
7673397318The technical support provided by crime laboratories can be assigned to five basic servicesPhysical Science Biology Unit Firearms Unit Document Unit Photographic Unit10
7673413874Physical Science UnitIncorporated the principals of chemistry, physics, and geology to identify and compare physical evidence11
7673426228Biology UnitApplies the knowledge of biological sciences in order to investigate blood samples, body fluids, hair, and fiber samples12
7673438016Fire Arms UnitInvestigates discharged bullets, cartridge cases, shot gun shells, and ammunition13
7673447784Document UnitProvides the skills needed for handwriting analysis and other questioned-document issues14
7673458585Photographic UnitApplies specialized photographic techniques for recording and examining physical evidence15
7673475949Toxicology Unitexamines body fluids and organs for the presence of drugs and poisons16
7673484573Polygraph UnitConducts polygraph or lie detector test17
7673496461Scientific Method1. Formulate a question worthy of investigation. 2. Formulate a reasonable hypothesis to answer the question. 3. Test the hypothesis through experimentation. 4. Upon validation of the hypothesis, it become suitable as scientific evidence18
7673513509Expert WitnessAn individual whom the court determines possesses knowledge relevant to the trial that is not expected of the average person. Is called on to evaluate evidence based on specialized training and experience that the court lacks the expertise to do19
7673533333Melendez-Diaz v. MassachusettsThe necessity for the forensic scientist to appear in court20
7673544086The Frye Standardthe evidence in question must be "generally accepted" by the scientific community21
7673553823Frye v. United StatesThe decision set guidelines for determining the admissibility if scientific evidence into the courtroom22
7673563545Daubert v. Merrell Dow PharmaceuticalAsserted that the Frye standard is not an absolute prerequisite to the admissibility of scientific evidence23
7673588480GatekeepersTrial judges were said to be ultimately responsible as _______ for the admissibility and validity of scientific evidence presented in their courts, as well as all expert testimony24
7673592921The Daubert CriteriaThe Supreme Court offered some guidelines as to how a judge can gauge scientific evidence: 1. Whether the scientific technique or theory can be (and has been) tested. 2. Whether the technique or theory has been subject to peer review and publication. 3. The technique's potential rate of error. 4.Existence and maintenance of standards controlling the technique's operation. 5.Whether the scientific theory or method has attracted widespread acceptance within a relevant scientific community25
7673612468Forensic Psychiatryan area in which the relationship between human behavior and legal proceedings is examined26
7673620212Forensic Odontologyinvolves using teeth to provide information about the identification of victims when a body is left in an unrecognizable state27
7673635251Forensic Engineeringis concerned with failure analysis, accident reconstructions and causes and origin of fires or explosions28
7673644725Forensic Computer Scienceinvolves the examination of digital evidence29

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