A forensic science technician finds, protects, documents and analyzes physical evidence so that it holds up in court. The work splits into two tracks: crime scene investigation (processing scenes in the field) and laboratory analysis (chemistry, latent prints, firearms, DNA). Most employers are local, state and federal government agencies, so hiring is slow, formal and based on background checks. Many crime scene jobs accept an associate degree or a certificate, but most lab jobs, especially DNA and chemistry, expect a bachelor's degree in a natural science. This roadmap builds the foundation
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Every stage from beginner to expert, with lessons, practice drills, projects, interview questions and free resources. Free with a Rolearch account.
Stage 1 of 3 · about 12 weeks
Understand what forensic evidence is, why handling matters, and build the science and writing base employers screen for.
Core chemistry and biology
Drug identification, toxicology, DNA and trace analysis all rest on chemistry and biology. If you understand why a reagent changes color or why DNA degrades in heat, you make better choices at a scene and in the lab.
Evidence types and chain of custody
A perfect analysis is useless if the defense can show the evidence was mishandled. Chain of custody is the written record of who held each item, when and why. It is the first thing a court tests.
Criminal law and rules of evidence basics
You need to know why courts accept some evidence and reject others: search and seizure rules, admissibility, and expert witness standards such as Daubert and Frye.
Technical writing and note-taking
Writing is the top skill for this job in the O*NET data. Your notes must let another scientist reproduce what you did, in plain, factual words with no opinions.
Office software for lab and case records
Case tracking, evidence logs and reports live in Word, Excel and Access. Clean data entry prevents errors that could surface in court.
Then 2 more stages (about 56 weeks in all) with lessons, drills, projects, 6 interview questions with strong answers and free resources.