Tool Marks And Impressions Flashcards

1
Q

Patent Impressions

A

2 dimensional impressions

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2
Q

Plastic impressions

A

3 dimensional

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3
Q

Sole

A

The pattern on the bottom of a piece of footwear

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4
Q

Tire groove ):

A

A depressions in the tread pattern

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5
Q

Tire rib

A

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

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6
Q

Tire ridge

A

Elevated area on the tread pattern

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7
Q

Track width

A

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

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8
Q

Tread pattern

A

The unique design of a tires surface

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9
Q

Wheelbase

A

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

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10
Q

Abrasion mark

A

A mark produced when a surface slides across another surface

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11
Q

Cutting mark

A

A mark produced along the edge as a surface is cut

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12
Q

Indentation Mark

A

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

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13
Q

Tool Mark

A

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

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14
Q

Latent impressions

A

Hidden impressions

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15
Q

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

There are two basic types of impressions: patent and latent

A

False

3 basic types of impressions plastic, patent and latent

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16
Q
True or false? Correct the statement if it's false. 
Impressions are always considered class evidence only.
A
False 
Impressions can be considered class or individual evidence depending on the situation
17
Q

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

Before anyone touches or alters an impressions it should be photographed

A

True

18
Q

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

Footprints can be removed from snow

A

True

19
Q

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

Tire patterns are generic and difficult to trace

A

False

There is a tread pattern database which keeps tire patterns information

20
Q

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

The front and rear track width of a vehicle is always the same.

A

False

Sometimes

21
Q

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

A

True

22
Q

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

The cut edges of a board show abrasion marks.

A

True

23
Q

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

Hammers can create indentation marks.

A

True

24
Q

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.

A

False

Different

25
Q

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

Rust, chips, and dents on a hammer can produce individualized tool Mark impressions.

A

True

26
Q

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.

A

False

The tool Mark is from the tool not necessarily try person

27
Q

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

A

False

There could be manufacturing errors or wear even before use

28
Q

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

Tool impressions can be cast using silicone based materials

A

True

29
Q

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

A

Track width: front tire to front tire

Wheelbase: front tire to back tire

30
Q

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

A

Braces, cavity fillings, shape of tooth

31
Q

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?

A

Sole pattern and individualized markings

32
Q

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?

A

All measurements (length, width and depth)

  • Characteristics of the tool (teeth, striations)
  • individualized mark from wear
33
Q

What is an example of an abrasion

A

From a file

34
Q

What is an example of a cut

A

Wire cutters

35
Q

What is an example of an indentation

A

Hammer head on wood

36
Q

What part of the jaw is the mandible

A

Bottom of the jaw

37
Q

What part of the jaw is the maxima

A

Top of the jaw