Examiners use both instrumental and chemical analysis when reviewing evidence.
FSD also manages the Secret Service's polygraph program nationwide. The division coordinates photographic, graphic, video, and audio and image enhancement service, as well as the Voice Identification Program. In addition, FSD is responsible for handing the Forensic Hypnosis Program. This system is now available to federal, state, and local investigators in the investigations of threats against public officials, as well as cases involving missing and sexually exploited children. FISH allows the document examiner to scan and digitize text and writings, and later search that material against previously recorded writings.