Gunshot Residue (Stub and Swab substrates)

This test is designed to challenge the forensic examiner who may be asked to identify particles of gunshot residue via bulk elemental or scanning electron microscopy techniques. Samples are distributed on pin-type aluminum SEM stubs with carbon adhesive tabs or Sirchie® brand swabs. Positive GSR samples are screened prior to distribution. This screening may be subcontracted to a ISO 17025 accredited laboratory and FTS is responsible for their work.