Trace evidence analysis dates back to Dr. Edmond Locard, a pioneer in forensic science around the turn of the last century known for the principle, “Every contact leaves a trace.” This discipline is associated with a wide range of activities, including the analysis of hair, fibers and explosives. HFSC offers arson evidence analysis to regional law enforcement agencies and fire departments. The section’s long-term goal is to expand trace services to include the analysis of chemical unknowns, hair, fibers, paints, explosives, soils, gunshot residue and on/off filament examinations. This section uses a variety of instruments and tools, including microscopes and gas chromatography/mass spectrometry.