Enrollment Deadline: 1 November 2025

Participants will report results for STR/YSTR analyses. This test can be paired with Test 5804 or 5704 to meet FBI QAS test frequency requirements.

Sample Description: Two known bloodstains and two questioned, prescreened stains. One or both of the questioned samples will contain a mixture of body fluids, and at least one of the mixtures will include semen. The known bloodstain standards are provided on cloth substrates. Questioned stains are prescreened; thus, no screening data will be collected for this testing series.

Samples ship in January.

This test is included on CTS' Scope of Accreditation to ISO/IEC 17043.