Duties of a Crime Scene Investigator?
A competent crime scene investigator collects essential credentials at the scene and documents them for use in investigations. Here are common duties that investigators typically perform. For related roles in crime science, learn how to become a forensic scientist.
- Protect the crime scene from contamination
- Collect and record evidence found at the scene
- Inventory the evidence collected at the scene
- Create a detailed map of the crime scene and notes indicating its layout
- Take photographs and sketches for documentation
- Analyze the evidence and submit a report to the relevant authorities
- Submit evidentiary documents as required
Steps to Become a Crime Scene Investigator
Requirements To Become A Crime Scene Investigator
There are several requirements to become a crime scene investigator. Here’s a quick overview:
- Must be a lawful resident of the United States
- Must be at least 18 (some agencies require 21) years old
- You must have a valid driver’s license
- Have a clean criminal record
- You should have successfully obtained a High School Diploma
- A bachelor’s degree or higher in criminal justice or a related field is often preferred
- You must complete police academy training if you want an sworn/administrative job
- Seek entry-level positions or internships to gain hands-on experience
- Ensure you can pass background checks and obtain security clearance
- Obtain certification by completing the Peace Officer Standards and Training (POST) program
Steps To Become A Crime Scene Investigator?
There is a methodical approach to becoming a detective in the United States. Here is a step-by-step manual to help you figure out how to become a detective:
Step 1: Education
To pursue a career as a detective, you generally need to be a lawful US resident and at least 18 (some agencies require 21). Most employers require a high school diploma or equivalent; many agencies now prefer a bachelor’s degree or four-year college education. A candidate may pursue a degree in criminal justice, criminology, forensic science, or a related field to become a detective. If you hold an unrelated degree, you may still qualify through specialized training in Crime Scene Investigation. For educational pathways, see How To Become A Forensic Scientist.
Step 2: Pass the Local Criminal Investigator Test
The applicant intending to become a detective needs to pass a written examination as part of the hiring process. In addition, the candidate must have a clean criminal record with no drug abuse or misconduct. Once the test is passed, the applicant may proceed to the police academy or seek a part-time role to gain experience.
Step 3: Join Police School or Do an Internship
There are two types of detectives: sworn and not sworn. All sworn detectives are police officers. They go through police academy training with the Peace Officer Standards and Training (POST) program. While non-sworn investigators seek part-time work under a successful investigator to gain familiarity with the duties.
In some states, including Texas, the process follows similar standards; see How To Become A Detective In Texas for state-specific guidance.
Step 4: Get A Certificate
A professional investigator can also obtain a certificate from the International Association for Identification (IAI). A person must serve in an investigator role for at least one year to qualify for certification. Certification involves both written and practical assessments. Earning a certification generally improves career progression.
How Long Does It Take To Become A Crime Scene Investigator?
Typical timelines include 2 years for an associate path and 4 years for a bachelor’s degree, plus academy training and certification. In total, many people spend about 5–7 years to become a fully certified detective in the United States, depending on the path and jurisdiction.
How Much Does A Crime Scene Investigator Usually Earn?
Salaries vary by location and experience. According to the U.S. Bureau of Labor Statistics, detectives and investigators generally earn a competitive income, with regional differences that can place salaries in the six-figure range in some areas. Factors such as city size, agency budget, and shift differentials can influence pay.
