A SIMPLIFIED GUIDE TO CRIME SCENE INVESTIGATIONS

1. The key principle underlying crime scene investigation is:

• Preservation of evidence

• Interrogation of suspects

• Arresting the perpetrator

• Public safety

2. The "Locard's Exchange Principle" helps investigators link suspects to a crime scene by:

• ensuring that every contact leaves a trace

• providing a method for DNA analysis

• offering a psychological profile of the suspect

• establishing a timeline of events

The difference between associative evidence and reconstructive evidence is:

• Associative evidence links a suspect to a crime, while reconstructive evidence helps to understand the sequence of events.

• Associative evidence is used in civil cases, while reconstructive evidence is used in criminal cases.

• Associative evidence is physical, while reconstructive evidence is digital.

• Associative evidence is always admissible in court, while reconstructive evidence is not.

Why are control samples collected at a crime scene?

• To establish a baseline for comparison

• To contaminate the evidence

• To confuse the investigation

• To replace the actual evidence

5. The uniqueness and probability of a piece of evidence can help determine its value by:

• Increasing its reliability and significance in a case.

• Decreasing its importance in the investigation.

• Having no impact on its value.

• Making it irrelevant to the case.

6. What are some examples of physical match evidence that can be valuable in a crime investigation?

• Fingerprint analysis, DNA profiling, and ballistic matching

• Eyewitness testimony and alibi verification

• Interrogation techniques and suspect profiling

• Surveillance footage and digital forensics

7. Why is it important for the crime scene team to conduct a thorough and careful examination of the scene?

• To ensure all evidence is collected and preserved

• To make the crime scene look organized

• To impress the media

• To finish the investigation quickly

A crime scene investigation is conducted to:

• Determine the cause of death

• Identify the perpetrator

• Collect evidence

• All of the above

Scenes that are typically secured, documented, and investigated include:

• crime scenes

• wedding scenes

• movie scenes

• art scenes

The facts of a case can change the theory of what occurred by:

• providing new evidence that supports a different theory

• confirming the original theory without any changes

• making the case more complicated without changing the theory

• having no impact on the theory at all