Crime Scene and Evidence Basics

material that can be related to a single source

• individual evidence
• control evidence
• trace evidence

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 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

In a crime scene sketch, there should always be an arrow to show which way is

• South
• East
• West
• North

In a crime scene sketch, to show where a dead body or weapon is located, one should measure and draw the distance from the evidence

• 1 immovable landmark
• 2 immovable landmarks
• 3 immovable landmarks

when securing a crime scene the two most important factors are to

• scan the scene, separate the witnesses
• safety of individuals, separate the witnesses
• see the scene, preserving evidence
• safety of individual, preserving evidence

What are the four patterns to search for evidence

• spiral, round, linear, quadrant
• grid, round, linear, zone
• spiral, grid, quadrant, no pattern
• spiral, grid, linear, quadrant

material that connects an individual or thing to a group that share similar characteristics

• trace evidence
• individual evidence
• class evidence

Also known as CSI, technicians who collect and preserve evidence from a crime scene

• Psychiatry
• Anthropologists
• Toxicologists
• Crime Scene Investigators

What is the first step in processing a crime scene?

• Photography
• Rough sketch
• Finished sketch
• Securing the perimeter