Crime Scene Investigation

The ability to establish the exact whereabouts of an item of evidence and under whose control it was from its collection at the crime scene to its presentation in the courtroom and everywhere in between is called

• chain of command
• record of evidence
• chain of custody

Blood-stained materials should be store in what type of container

• paper bags
• air-tight new paint can
• mason jar with a lid
• plastic bag with a seal

"With contact between two items, there will be an exchange." This is known as _____

• physical evidence

• Locard's exchange principle
• Forensic exchange principle
• the law of forensics 

It is important to separate witnesses at a crime scene in order to 

• prevent contamination of evidence
• prevent them from talking and forming a collusion
• prevent them from leaving the scene

The first officer arriving at a crime scene, after providing or obtaining medical assistance for the injured and effecting an arrest of suspects (if possible), should immediately:

• photograph the scene.

• search for evidence.

• make a rough sketch of the scene.

• secure the scene.

A crime scene sketch is a required part of an investigation.

• True

• False

All evidence must be collected in glass test tubes.

• True

• False

All evidence gathered at a crime scene must be

• labeled and documented

• analyzed in a scientific manner

• handled carefully so not to contaminate the specimen

• all of the above

Processing a crime scene involves:

• only collecting evidence and taking pictures

• Collecting evidence, sketching the scene, taking pictures, interviewing suspects, and examining the scene

• only examining the scene and interviewing witnesses

• only sketching the scene and taking pictures

The first step that an officer takes when approaching a crime scene is to

• begin to document the crime scene

• check the body if there is one, and get medical attention

• isolate possible witnesses

• observe the scene for possible evidence