Forensic science technician responsibilities are to keep records and prepare reports detailing findings, investigative methods, and laboratory techniques; testify in court about investigative or analytical methods or findings; use photographic or video equipment to document evidence or crime scenes; operate and maintain laboratory equipment and apparatus; prepare solutions, reagents, or sample formulations needed for laboratory work; confer with ballistics, fingerprinting, handwriting, documents, electronics, medical, chemical, or metallurgical experts concerning evidence and its interpretation; visit morgues, examine scenes of crimes, or contact other sources to obtain evidence or information to be used in investigations;
train new technicians or other personnel on forensic science techniques; collect evidence from crime scenes, storing it in conditions that preserve its integrity; reconstruct crime scenes to determine relationships among pieces of evidence; examine and analyze blood stain patterns at crime scenes; collect impressions of dust from surfaces to obtain and identify fingerprints; interpret laboratory findings or test results to identify and classify substances, materials, or other evidence collected at crime scenes; examine physical evidence, such as hair, fiber, wood, or soil residues to obtain information about its source and composition; analyze gunshot residue and bullet paths to determine how shootings occurred; use chemicals or other substances to examine latent fingerprint evidence and compare developed prints to those of known persons in databases; review forensic analysts' reports for technical merit; determine types of bullets and specific weapons used in shootings; identify and quantify drugs or poisons found in biological fluids or tissues, in foods, or at crime scenes; examine firearms to determine mechanical condition and legal status, performing restoration work on damaged firearms to obtain information such as serial numbers; compare objects, such as tools, with impression marks to determine whether a specific object is responsible for a specific mark.