The occupation, 'Forensic Science Technicians', include: Ballistic Expert, Ballistic Technician, Ballistician, Ballistics Expert, Biometric Fingerprinting Technician, and other titles.Forensic Science Technicians collect, identify, classify, and analyze physical evidence related to criminal investigations. perform tests on weapons or substances, such as fiber, hair, and tissue to determine significance to investigation. may testify as expert witnesses on evidence or crime laboratory techniques. may serve as specialists in area of expertise, such as ballistics, fingerprinting, handwriting, or biochemistry.