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26 Cards in this Set
- Front
- Back
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physical evidence
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human hair
blood broken glass fingerprints bullet |
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not physical evidence
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psychological profile
expert testimony eyewitness account |
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Locard
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Exchange Principle - anything that you touch, you will leave something behind or you will pick up something - such as fingerprints
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Goddard
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Ballistics
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Gross
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Blood Splatter Patterns
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Galton
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finger printing
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Bertillon
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Anthromentrics - measurement
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Orfila
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Poisons
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Qualitative
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color of thread
striation on a bullet type of animal hair anything that is a type of thing |
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Quantitative
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anything that can be measured
caliber of a gun length of car skid marks |
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Forensic science
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is the use of a broad spectrum of sciences to answer questions of interest to the legal system. This may be in relation to a crime or a civil action.
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Physical Forensics
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includes trace evidence, firearms ientification, document examination and fingerprint analysis
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Biological Forensics
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is the study of evidence that is a living organism or was living
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3 Basic Impression Types of Fingerprint
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latent prints - are invisuble and can only be seen under speical processing, such as dusting or fuming
patent prints - patent prints occur when substances such as blood, ink, paint. grease, or dirt are on the finger of the person leaving behind the print impressed prints - three dimensional quality - they are indentations left in soft pliable surfaces |
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AFIS
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automated fingeerprint identification system maintained by the FBI
Print Matching - has to have 12 identical points |
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Blood
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Wet Stains - Dry Stains
Blood can help id a person can help determine what weapon was used |
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Body of Evidence
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It's a complete set of all the evidence
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Striations on Bullets
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striations are considered Qualittative evidence. There are no numbers involved
striations are examined with microscopes |
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Cyanoacrylate
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fast setting hard and brittle adhesive
innovative forensic tool active ingredident in Super Glue |
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Edwards Five Fingerprint Classifications
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Arch
Left Loop Right loop Tented Arch Whorl |
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Types of Fingerprints
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Plain Arch
Tented Arch Radial Loop Ulner Loop Central Pocket Loop Plain Whorl Accidental Whorl Double Loop |
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Bullet Identification
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When bullets are collected to be compared to a specific firearm they first have to be examined to see if that are of a caliber
They will then be taken to be tested if the pattern of rifling impressions found on the bullet match the pattern of rifling contained in the barrel of the suspected gun. |
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What is a Fingerprint
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a finger print is an impression of the friction ridges of all or any part of the finger
Dr. Henry Faulds |
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Different kinds of Prints and Impressions
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Face
Teeth Foot Shoe Lip Hand Tire Mthodds of Collection - blood stain - hard tissues -hair |
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Types of Material Evidence
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Paint
Glass Fibers |
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Detecting Fingerprints
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Ninhydrin - is possibly the most productive methods of detecting fingerprints
It is also one of the most cost effective ways of catcing a criminal may be applied to porous surfaces |
