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Forensic science Flashcards

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14098190028What percentage has the innocence project found up to wrongful conviction cases resulted from flawed eyewitness testimony?87%0
14098190029What is our ability to observe affected by?The enviroment, and the natural filters of sensory details in our brain1
14098190030What are the 5 types of evidence?Physical - fingerprints Biological - DNA Trace - small amount of both physical and biological Class - broke down into categories Direct - DNA and fingerprint (individualized)2
140981900313 parts of hair shaftMedulla - middle part core Cuticle - out side part Cortex - inner part right out side of medulla3
14098190032Proteins found in hair shaftKeratin - makes of the hair and fingernails4
14098190033Hair evidence has been used since what century?19th5
14098190034Three stages of Hair developmentAnagen (growth) Catagen (resting) Telogen (dormancy)6
14098190035fibers are what type of evidenceclass evidence7
14098190036What ways are fibers gathered?Tape, forceps, a vacuum, or a sticky lint roller8
14098190037Two types of Fibers?Natural - Cotton Synthetic - Man made9
14098190038How may Fibers be analyzed?Polarized light microscopy Infrared spectroscopy Burn tests Test for solubility10
14098190039Type of Fingerprints?Latent - not visible on unaided eye Plastic - Indentation Patent - visible11
14098190040Characteristics of Fingerprints?Loops, Arches, Whurls12
14098190041When are fingerprints formed?At about 10 weeks in the womb13
14098190042Fingerprint RidgeLines on the FIngerprint14
14098190043minuateBreaks in the lines of fingerprints15
14098190044DeltaTriangle piece in fingerprint16
14098190045coreCenter part of fingerprint17
14099843356What can the characteristics of blood drops on surfaces show?Direction of blood movement Location of source of blood Indicate the nature of the wound producing blood18
14099843357Blood consists of?Cellular components Plasma - containing dissolved ions, proteins, and other substances19
14099843358Blood types result from what?Presence of antigens on surface of red blood cells20
14099843359What type of evidence is blood?class evidence Direct ( only through white blood cells - which contains DNA)21
14099843360What can investigators use to reveal hidden blood spatter?Luminol22
14099843361What has helped enhance detection of forged documents, increased quantitative analysis, and improved objectivity?Technological advances - biometric signature pads, and infrared spectroscope23
14099843362What type of evidence is Glass?Class24
14099843363How is density of an object measured?It's mass divided by its volume25
14099843364What side is larger the exit hole or the entry hole? (Bullet)Exit Hole26
14099843365What methods do Forensic Scientists use on Glass?Fracture Matching Scanning electron microscopy of headlight filaments after collisions Use XRF ( X-Ray fluorescence) Also ICP-MS (inductively coupled plasma-mass spectrometry)27
14099843366radial fractureSide of glass opposite the point of impact28
14099843367Concentric FractureOccur on side same as the point of impact29
14099843368The Three Types of Impressions?Patent - Visible Latent - Non visible without help Plastic - Indentation30
14099843369Impressions are what type of evidence?Class31
14099843370Dental Impressions are what type of evidence?Class ( depending on points of comparison )32
14099843371Types of tire impressions are?Skid marks Yaw marks Scrubs33
14099843372Three categories of tool marks?Indentation marks Abrasion marks Cutting Marks34
14099843373What organizations are establishing guidelines?Scientific Working Groups and Organization of Scientific Area Committees35

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