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Investigations > Section 5.5 > Flashcards

Section 5.5 Flashcards

1
Q

Example, muddy patch with a footprint we can determine by how deep the footprint goes how much what?

A

The suspect may have weighed

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2
Q

Walking footprints are different from running footprints because they leave different depths. This determines what?

A

Speed

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3
Q

This can be individualized down to the individual. Example, there is an impression of exactly this shoe and this size at the crime. They cannot tell just by that because there are multiple same shoes. However, the _____ ______ may be different.

A

wear pattern

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4
Q

Because the wear pattern is different their is something distinct and if it is present on the footprint and the shoe it can potentially prove it was you. True or False

A

True

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5
Q

If you are walking around and unsure of where you are going this can show what in the footprints?

A

hesitance

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6
Q

Example, tracks in a business and there is __________ you can eliminate any of the other employees because they would not b e what?

A

HESITANCE

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7
Q 
weight 
speed 
wear patterns 
hesitance 
unaware of terrain 
direction of travel
A

Shoe and tire prints

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8
Q

Arrive at a fresh scene and there are tire tracks tearing out of the place and heading south on this road. You can tell the other officers that you know which way the suspect is going so they can follow it based on what?

A

Direction of travel

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9
Q

When you get a shoe or tire print you want to do what?

A

Make a cast

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10
Q

Get a marker or ruler and lay it next to the print and get photos. After it has been documented well make a ______.

A

Cast

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11
Q

What is made with a white powder and add water and mix it and pour it onto a track and leave it until it Harden and now you have a perfect negative of a print?

A

cast

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12
Q

Does it always work when you make a cast or could you mess it up?

A

You could mess it up that is why it is important to take photos and document

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13
Q

Are bite marks on skin accurate?

A

no

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14
Q

Bite-marks in chewing gum that the suspect left at the sense could be matched because it leaves a detailed impression. True or False

A

True

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15
Q

Forensic odontologists in the last 10-20 years have said that what is not accurate?

A

bite marks

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16
Q

There are people in prison for something they did not do because they were matched to a bite mark that was not theirs. True or False

A

True

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17
Q

Does every tool leave a mark?

A

Yes

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18
Q

Example, pry bar breaking and entering.

A

leaves a tool mark

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19
Q

It is easy to tell what tool made the mark but it is more difficult to tell the specific tool. True or False

A

True

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20
Q

Firearm crime: First thing the officer looks at is the what?

A

rifling

21
Q

Grooves on the metal inside of the gun that the bullet spirals on when it comes out of the gun is what?

A

rifling

22
Q

By the time the bullet leaves the gun it is spinning. Why?

A

to make it go straight

23
Q

The grooves in the rifling catch the bullet and make it do what?

A

Spin

24
Q

Prior to the revolutionary war we just fired spheres and muskets and they were not accurate because they did not have what?

A

rifling

25
Q

Different brands of guns have different rifling. True or False

A

True

26
Q

If you look at the spent bullet and it survived the impact, we can look at the rifling to determine who the gun belongs to. True or False

A

True

27
Q

Every time you shoot the gun various changes happen to the inside of the gun and make it a more distinct pattern to show the specific gun it comes from. True or False

A

True

28
Q

If the bullet casing have the exact same ______ on the projectile you can tell the bullet from the crime scene came from that gun.

A

Striations

29
Q

What makes the initial spark in the gun?

A

Primer

30
Q

When a gun goes off and you pull the trigger and the firing pin flies forward and punctures the primer and that provides a spark and the gun powder and the gun goes Ka-boom. True or False

A

True

31
Q

All the pressure created can only go out and as it goes it pushes the bullet down the gun and out. True or False

A

True

32
Q

What becomes distinct over time?

A

firing pin

33
Q

If you can get an ejected shell casing, you can look at the mark that the firing pin made in the primer and you can use that to do what?

A

Find the specific gun

34
Q

When the gun has been fired there is a mechanical piece in the gun called the ________ that comes in and grabs the bullet and tosses it out and puts a new bullet in.

A

Extractor

35
Q

Does the extractor leave a mark?

A

Yes

36
Q 
Rifling 
Striations 
Firing Pin Impressions 
Extraction Marks 
Gunshot residue
A

Firearms

37
Q

Does gun powder burn perfectly?

A

No

38
Q

Out of the barrel of the gun there is a poof of unburned powder. It is fairly microscopic and it gets onto the hands of the person firing the gun. True or False

A

True

39
Q

Glass is laying all over at a crime scene and if there is a lot of it lying around we can look at the suspect to see if their shoes have that glass in them. True or False

A

True

40
Q

In shooting cases where a bullet goes through the window can you tell which bullet went through first?

A

Yes based on the cracks

41
Q

When a crack hits an already existing crack what happens?

A

It stops

42
Q

Soil can be taken or left at the crime scene. True or False

A

True

43
Q

Example, crime scene and there is a footprint in the dirt from the bad guy and we find that the soil is not from around here. We can use it to determine where the suspect is from. True or False

A

True

44
Q

example, we find a dead body way in the middle of nowhere and we take soil samples and get the suspects boots and we match it to the area found, True or False

A

True

45
Q

Two things need to be determined when looking at two things
1.
2.

A
  1. what kind of dirt it is

2. what kind of pollen do you find in the dirt

46
Q

Most of this falls into the ground and goes into the dirt.

A

Pollen

47
Q

Based on the kinds and the amount of pollen on the dirt we can be more specific. True or False

A

True

48
Q

If you find specific soil where the body was found, we can tell that the person was at least in the are and it is good circumstantial evidence that he is the one the dumped the body. True or False

A

True

Investigations (21 decks)

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