Ch 4 Physical Evidence

Question 0

Individual characteristics -

Answer 0

Can be identified with a degree of probability as originating with a particular person or source. (Ex. Fingerprints, palm prints, footprints).

Question 1

Class Characteristics -

Answer 1

Characteristics of physical evidence that are common to a group of objects or persons. (Ex. Unworn pair of nike shoes, specific type of hammer, soil).

Question 2

Residue prints -

Answer 2

Prints that are formed when the soles of footwear, feet and tires are contaminated with foreign matter such as blood or dust and leave a print on a firm base, such as a floor.

Question 3

Impressions -

Answer 3

Result from footwear, feet and tires treading in some moldable materials such as earth, clay and snow. For residue prints and impressions the sequence is always photograph and then collect the evidence.

Question 4

Four methods that are used to collect/develop latent prints -

Answer 4

*Traditional powders
*Use of fluorescent powders
*Application of chemicals
*Cyanoacrylate or super glue fuming
(Super glue is common because its easy to use, low cost, remarkable results).

Question 5

Most common method of developing latent/invisible prints :

Answer 5

Use of traditional powders

Question 6

Once a print is found on scene :

Answer 6

It should be photographed immediately with a rigid scale in view.

Question 7

Investigators must acquire a broad, working knowledge of firearm evidence for three primary reasons :

Answer 7

• Frequency they will encounter it
• The value of such knowledge in a combat situation.
• Your personal safety and that of others.