Evidence Collection

What is the first step in collecting DNA evidence from a crime scene?

• Packaging the evidence

• Documenting the evidence

• Wearing gloves

• Labeling the evidence

Why are evidence bags sealed?

• So tampering is immediately apparent

• Because of the chain of custody

• So that the evidence labels have as much information on them as possible

• All are true

What is the best practice for labeling DNA evidence collected at a crime scene?

• Using a pencil

• Using a permanent marker

• Using a ballpoint pen

• Using a highlighter

What should be included on the packaging of any piece of evidence?

• description of item

• source/location of where item was recovered

• names of anyone who has had contact with item

• all of these

Was this bag sealed properly?

• Yes

• No

Which of the following is a common source of DNA on clothing found at a crime scene?

• Fabric dye

• Sweat

• Detergent residue

• Dust

This person documents the crime scene and collect physical evidence

• Crime Scene investigator

• First responder

• Specialist

A written record of all people who have had possession of an item of evidence.

• Chain of Custody

• Trace Evidence

• Locard exchange

What is idea behind Locard's Exchange Principle?

• Every action has an opposite reaction

• Every contact between two objects leaves a trace behind

• Matter cannot be created or destroyed

• All evidence is important

What is the primary purpose of collecting evidence at a crime scene?

• To identify the suspect

• To establish facts in a legal investigation

• To create a database of evidence

• To prevent contamination