forensics

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crime scene:

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31 Terms

1

crime scene:

Any physical location in which a crime has occurred or is suspected of having occurred

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2

primary crime scene:

The original location of a crime or accident

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3

secondary crime scene:

An alternate location where additional evidence may be found

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4

suspect:

Person thought to be capable of committing a crime

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5

accomplice:

Person associated with someone suspected of committing a crime

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6

alibi:

Statement of where a suspect was at the time of a crime

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7

eyewitness statement:

Refers to an account given by people of an event they have witnessed

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8

testimonial evidence:

Includes oral or written statements given to police as well as court testimony by people who witnessed an event

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9

trace evidence:

Fragments of physical evidence that can be transferred when two objects interact

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10

physical evidence:

Refers to any material items that would be present at the crime scene, on the victims, or found in suspects possession

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11

secure the scene -

done by first responding officer

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12

seperate the witnesses -

ensure that no one present at the scene of the crime communicates with each other

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13

scan the scene -

determine what to photograph

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14

seeing the scene -

take photographs

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15

sketch the scene -

a rough sketch of the scene before the final copy is created

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16

search for evidence -

take a linear, spiral, grid, or quadrant route in order to locate evidence

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17

secure the evidence -

ensure all collected evidence is properly packaged and sealed

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18

who is part of the investigation team?

·       Police officers

·       Crime scene investigators

·       Medical examiners

·       Detectives

·       Forensics specialists

·       District attorney (if required)

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19

eyewitness example

Eyewitnesses may be required to give description at a trial of a robbery or a road accident someone has seen. This includes identification of perpetrators, details of the crime scene, etc.

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20

reality for eyewitnesses

In reality, the memory doesn’t record experiences (like a video camera); It creates stories based on true experiences

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21

physical evidence examples?

paint, glass, explosives, ballistics, dust/dirt, tracks, fingerprints, tool marks, wounds, dna, skeletal remains, bodily fluids

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22

what are the different types of evidence?

circumstantial (ie. trace), physical, biological, testimonial, class/individual

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23

what is the chain of custody?

the movement + location of physical evidence from the time it is obtained until it is presented in court

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24

what are the different priorities at a crime scene?

·       Obtain medical aid to those in need

·       Arrest the perpetrator

·       Secure the crime scene

·       Determine crime scene boundaries

·       Located path of entry and exit

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25

what happens when lead investigators arrive at the scene?

1.     Boundaries of scene determined

2.     Establish perpetrators path of entry and exit

3.     Obvious items photographed and documents

4.     Initial walk through to gain overview and develop strategy for systematic search

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26

what are fibres?

smallest unit of textile material woven or twisted together to form a thread or yarn

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27

what are the types of fabric weaves?

plain, twill, and satin

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28

what are types of synthetic fibres?

polyester, rayon, nylon, acetate, acrylic, spandex

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29

what are types of natural fibres?

silk, cotton, wool, mohair, cashmere

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30

what is the usage of hair particles?

It can give evidence of age, gender and race which can strengthen ties between a suspect and the crime scene

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31

rigor mortis

the stiffening of the body muscles after death

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