Crime Scene Investigation

What does Locard's exchange principle state?

• Every crime will be solved

• Every contact leaves trace evidence

• All physical evidence provides information

• Crimes cannot be solved without physical evidence

What type of evidence cannot prove 100% that a person was at the crime scene during the crime?

• Direct

• Circumstantial

What type of evidence would a fingerprint be considered?

• Physical

• Biological

True or False: Blood would be considered both biological and class evidence

• True

• False

True or False: Individual evidence would be more beneficial to an investigation than class evidence

• True

• False

True or False: Direct evidence narrows an identity to a single person or thing

• True

• False

Eyewitness testimony would be considered:

• Direct evidence

• Circumstantial evidence

A shoe print (if unique) would be considered both:

• Physical

• Biological

• Class

• Individual

When arriving to a crime scene the officer has a duty to ensure the scene is safe and

• secured

• scanned

• photographed

• sketched

In order for an officer to figure out what actually happened, it is common practice to

• speak with the witnesses in a group setting

• speak with the witnesses individually

• only speak with the witnesses who have pertinent information