Tool Marks And Impressions Flashcards Preview

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Flashcards in Tool Marks And Impressions Deck (37):
1

Patent Impressions

2 dimensional impressions

2

Plastic impressions

3 dimensional

3

Sole

The pattern on the bottom of a piece of footwear

4

Tire groove ):

A depressions in the tread pattern

5

Tire rib

An individual ridge of tread running down the tread area and around the circumference of the tire

6

Tire ridge

Elevated area on the tread pattern

7

Track width

The distance from the center of the tread pattern on the LEFT tire to the center of the tread pattern on the corresponding RIGHT tire

8

Tread pattern

The unique design of a tires surface

9

Wheelbase

The distance from the center of the FRONT axle on the vehicle to the center of the REAR axle

10

Abrasion mark

A mark produced when a surface slides across another surface

11

Cutting mark

A mark produced along the edge as a surface is cut

12

Indentation Mark

A mark or impression made by a tool on a softer surface

13

Tool Mark

Any impression, abrasion or cut made when context occurs between a tool and object

14

Latent impressions

Hidden impressions

15

True or false? Correct the statement if it's false.

There are two basic types of impressions: patent and latent

False
3 basic types of impressions plastic, patent and latent

16

True or false? Correct the statement if it's false.
Impressions are always considered class evidence only.

False
Impressions can be considered class or individual evidence depending on the situation

17

True or false? Correct the statement if it's false.
Before anyone touches or alters an impressions it should be photographed

True

18

True or false? Correct the statement if it's false.
Footprints can be removed from snow

True

19

True or false? Correct the statement if it's false.
Tire patterns are generic and difficult to trace

False
There is a tread pattern database which keeps tire patterns information

20

True or false? Correct the statement if it's false.
The front and rear track width of a vehicle is always the same.

False
Sometimes

21

True or false? Correct the statement if it's false. Dental work and dental impressions can be matched to a particular suspect.

True

22

True or false? Correct the statement if it's false.
The cut edges of a board show abrasion marks.

True

23

True or false? Correct the statement if it's false.
Hammers can create indentation marks.

True

24

True or false? Correct the statement if it's false.
The cutting pattern of a used hacksaw blade is the same as a Stryker saw.

False
Different

25

True or false? Correct the statement if it's false.
Rust, chips, and dents on a hammer can produce individualized tool Mark impressions.

True

26

True or false? Correct the statement if it's false.
If a tool make impression is matched to a specific tool, then the owner of that tool must have been at the crime scene.

False
The tool Mark is from the tool not necessarily try person

27

True or false? Correct the statement if it's false.
New screwdrivers of the same size snd brand always leave the the same tool Mark impression

False
There could be manufacturing errors or wear even before use

28

True or false? Correct the statement if it's false.
Tool impressions can be cast using silicone based materials

True

29

What's are the two measurements found on a car? What's the difference between them?

Track width: front tire to front tire
Wheelbase: front tire to back tire

30

List characteristics of teeth that would allow it to be used as individual evidence?

Braces, cavity fillings, shape of tooth

31

What characteristics of shoes are noted when trying to match a shoe print found at a crime scene with a shoe print of a suspects shoe?

Sole pattern and individualized markings

32

Two different tools were used to strike a piece of board. Two impressions were made in the wood. Assuming the same person used the tools to make the impression, what characterstics could be used to distinguish one tool from the other?

All measurements (length, width and depth)
-Characteristics of the tool (teeth, striations)
- individualized mark from wear

33

What is an example of an abrasion

From a file

34

What is an example of a cut

Wire cutters

35

What is an example of an indentation

Hammer head on wood

36

What part of the jaw is the mandible

Bottom of the jaw

37

What part of the jaw is the maxima

Top of the jaw

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