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Comprehensive Criminal Investigator Job Description, Duties, Responsibilities, Requirements, and Qualifications

Comprehensive Criminal Investigator Job Description, Duties, Responsibilities, Requirements, and Qualifications
September 27, 2025

Explore the critical requirements, core duties, primary responsibilities, and key skills that should be included in a comprehensive Criminal Investigator job description.

What does a Criminal Investigator do?

A criminal investigator is someone who helps law enforcement agencies, individuals, and businesses solve crimes and bring criminals to justice.

Job Description

We are looking for a qualified criminal investigator to join our team. Your job will be to investigate potential crimes and gather evidence against suspects. This could involve crimes like murder, fraud, or organized crime. You will need to be able to work both independently and as part of a team.

We are looking for someone who is hardworking, trustworthy, and dedicated to serving the public. A college degree and at least five years of experience in law enforcement is preferred.

Job Duties and Responsibilities

  • Investigate complex crimes and other violations of the law.
  • Collect and analyze evidence.
  • Lead other law enforcement personnel at crime scenes.
  • Make decisions and conclusions based on evidence to help prosecute criminals.
  • Write detailed reports and maintain records.
  • Obtain search and arrest warrants and make arrests as needed.
  • Testify in court about the evidence in the case.
  • Use firearms and surveillance equipment.
  • Continue training and development as required.
  • Maintain confidentiality.

Requirements and Qualifications

  • Bachelor's degree in criminal justice or related field, or equivalent training at a federal law enforcement college.
  • Prior experience is preferred.
  • Additional certification may be required.
  • Computer skills and proficiency in multimedia technology.
  • Critical thinking and problem-solving skills.
  • Ability to work irregular hours, including weekends and holidays.
  • Willingness to travel.

Alternate Job Titles

  • Criminal Investigator/Specialist

Criminal Investigator Salary

The earning potential of a Criminal Investigator can vary significantly based on factors such as geographic location, industry, professional experience, educational background, and the specific employer. On average, the annual salary for an Criminal Investigator in the United States is approximately $78519.

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