MCOLES Crime Scene Investigation Questions and Answers

Question 1

An officer is the first to arrive at a homicide scene inside a residence. After confirming the victim is deceased and the scene is safe, what is the officer's most critical next step to prevent evidence contamination?

Accepted Answer

Establish a single entry and exit path and document all personnel moving through it.

Answer

To maintain the integrity of a crime scene, controlling access is paramount. Establishing a common approach path, or a single point of entry and exit, minimizes unnecessary foot traffic and reduces the risk of contaminating or destroying evidence. Documenting everyone who enters and exits through this path (a scene log) is a standard and critical procedure.

Question 2

Which of the following best describes the primary purpose of maintaining a strict chain of custody for an item of evidence?

Accepted Answer

To provide a chronological paper trail documenting who has handled the evidence, ensuring its integrity and admissibility in court.

Answer

The chain of custody is a formal, written record that tracks evidence from the moment it is collected until it is presented in court. Its fundamental purpose is to prove the evidence is authentic and has not been tampered with, altered, or substituted, which is essential for it to be admissible during legal proceedings.

Question 3

A single officer must conduct an evidence search in a small, square room with a significant piece of evidence located in the center. Which search pattern would be most efficient and logical to use in this situation?

Accepted Answer

Spiral search

Answer

The spiral search pattern is highly effective for a single searcher in a room or defined area. The officer can start at the central piece of evidence and spiral outward, or start at the perimeter and spiral inward. This method ensures thorough coverage without the need for multiple officers that line, grid, or zone searches often require for efficiency.

Question 4

An officer finds a wet, bloody firearm at an outdoor crime scene on a rainy day. What is the proper procedure for packaging this specific piece of evidence?

Accepted Answer

Secure the firearm in a breathable cardboard gun box, allowing it to air dry.

Answer

Packaging a wet item, especially metal or an item with biological evidence, in a plastic bag will trap moisture, which can promote rust and the degradation of DNA evidence. The best practice is to package the firearm in a container that allows it to air dry naturally, such as a cardboard gun box. This protects the weapon, preserves trace evidence, and prevents destructive moisture buildup.

Question 5

Which of the following is an essential component that MUST be included on a finished crime scene sketch for it to be considered complete and admissible?

Accepted Answer

A legend or key to identify the symbols used on the sketch.

Answer

A crime scene sketch uses symbols to represent objects, furniture, and evidence. A legend or key is essential because it explains what each symbol depicts, allowing anyone viewing the sketch (investigators, attorneys, jury) to understand it accurately. Without a legend, the sketch is just a collection of meaningless shapes.

MCOLES - Michigan Commission on Law Enforcement Standards Practice Test

MCOLES - Michigan Commission on Law Enforcement Standards Practice Test

MCOLES Crime Scene Investigation Questions and Answers