A crime scene technician, or forensic science technician, collects and processes criminal evidence. A crime scene technician also collects DNA samples and fingerprints to aid in criminal prosecution. Regular duties include analyzing criminal evidence, informing law enforcement officials of lab results, recreating crime scenes, taking photographs, and providing courtroom testimony. Crime scene technicians apply their knowledge of forensic science to aid law enforcement investigators in understanding what has happened at the crime scene and who is responsible for the crime.