Free Law Enforcement Criminal Investigation Fundamentals Questions and Answers 1

Question 1

What is the primary legal purpose of maintaining a strict chain of custody for an item of physical evidence?

Accepted Answer

To prove the evidence has not been altered or substituted.

Answer

The chain of custody is a chronological paper trail documenting the seizure, custody, control, transfer, analysis, and disposition of evidence. Its primary purpose is to establish that the evidence presented in court is the same as that which was collected at the crime scene and has not been tampered with, contaminated, or substituted.

Question 2

An investigator is speaking with a person who witnessed a crime but is not considered a suspect. The goal is to gather as much factual information as possible about the circumstances. This type of non-accusatory questioning is best described as a(n):

Accepted Answer

Interview

Answer

An interview is a non-accusatory, structured conversation aimed at gathering information from witnesses or individuals who may have knowledge about a crime. An interrogation, by contrast, is typically accusatory and is conducted with a suspect to obtain a confession or admission of guilt.

Question 3

An investigator must process a large, open field where a victim's personal belongings are believed to have been scattered. To ensure the most thorough coverage, which search pattern would be most effective for this type of scene?

Accepted Answer

Grid search

Answer

A grid search involves two parallel searches, offset by 90 degrees, performed one after the other. It is very thorough and effective for large outdoor scenes, as it covers the entire area from two different perspectives, minimizing the chance of missing evidence.

Question 4

In criminal investigation, the legal principle of "corpus delicti" requires the prosecution to establish that:

Accepted Answer

A specific crime has actually been committed.

Answer

Corpus delicti, Latin for "body of the crime," is the principle that requires the prosecution to present evidence proving that a crime actually occurred. It ensures that a person cannot be convicted based solely on a confession without independent proof that a criminal act took place.

Question 5

During a burglary investigation, a crime scene technician discovers a single carpet fiber on the jagged edge of a broken window pane. This small, often microscopic piece of evidence, which was likely transferred from the suspect's clothing, is best classified as:

Accepted Answer

Trace evidence

Answer

Trace evidence consists of small, often microscopic materials that are transferred between people, objects, or the environment during the commission of a crime. Examples include hair, fibers, paint chips, and glass fragments.

Law Enforcement Practice Test

Law Enforcement Practice Test

Free Law Enforcement Criminal Investigation Fundamentals Questions and Answers 1