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28 Cards in this Set
- Front
- Back
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3 important factors must be considered in order to introduce evidence in a trial.
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a. the article must be properly identified.
b. continuity or chain of custody. c. competency must be proved. |
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systematic procedure for proof of identity.
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a. protection.
b. collection. c. identification. d. preservation. e. transmission. f. disposition. |
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handling paper evidence
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with forceps or tongs and placed into a cellophane envelope.
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handling glass
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placed over pegs imbedded into a board.
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handling firearms, knives, and tools.
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tied to a board by means of strings then packing securly into a cardboard box.
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true or false.
it is better to take too many photographs than too few. |
true
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handling hairs and fibers.
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should be picked up with forceps or tweezers and placed ina filter paper which is then folded into a drugist fold. cellophane tape may be used to seal the edges. the folded paper is then placed into a pillbox.
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handling dirt, soil, particles, filings, and fragments
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should be placed in filter paper, which is folded and sealed then put into a pill box.
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handling bullets and fired cases
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these should be put into seperate small boxes and surrounded with cotton.
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handling clothing
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each article of clothing should be packed seperately in a paper bag. wet clothes should be air dried.
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handling wet blood
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approx 5cc should be collected. if it is a small quantity it should be collected with a cotton swab or gauze pad. it is then air dried and placed in an envelope, a test tube or sterile container.
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what is edta
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a preservative used to preserve blood.
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handling dry blood
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when found on clothing or small objects the items should be collected. when the area is to large a swab is moistened with distilled water.
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collecting semen
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items need to be airdried before being packaged.
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collecting saliva
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it should be collected in a test tube or with a swab and air dried before packaging.
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what type of plaster is used in casting
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dental stone or plaster of paris.
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what is a latent print
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hidden or relatively invisible and must be developed by a special method.
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what is a plastic print
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found on objects such as soap, butter, putty, melted wax. impressions are depressed below the original surface.
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what is a visible print
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left by fingers covered with a colored material, such as paint, blood, grease, ink or dirt.
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powder is recommended on what types of surfaces to develop latent prints
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hard, dry, and smooth
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3 qualities of a powder
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should be adhesive
should not absorb water should photograph well. |
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white or grey powders work best on what types of surfaces
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dark
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black powder works best on what type of surface
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light
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fluorescent powder work best on what type of surface.
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multi-colored surfaces
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iodine method is best used on what type of surface
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porous, such as paper and card board
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cyanoacrylate method is best used on what type of surface
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nonporous, such as glass, metal, plastic, and leather.
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silver nitrate works best on
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paper and wood
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nunhydrin works best on
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paper and wood
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