This test is designed for laboratories using Probabilistic Genotyping software. All sample sets will contain two known bloodstain standards and two questioned mixture stains. At least one questioned stain will be appropriate for differential testing. Participants will be asked to screen samples for body fluid(s), analyze samples for DNA using Probabilistic Genotyping software, and report statistical conclusions. Known bloodstain standards are available in a choice of substrates.

Choose between known bloodstain standards on cloth substrates (Test 5904) or FTA™ Micro Cards (Test 5905). The timing of this test allows it to be paired with several of our test offerings to meet FBI QAS test frequency requirements. Including Probabilistic Genotyping 5901 or 5902, Forensic Biology 5701 or 5702, and DNA – Sample Specific 5801 or 5802.

The samples that comprise tests 5904 and 5905 are the same, but differ from those that comprise the tests offered in the first half of the year; 5901 and 5902.

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

Samples ship in early August. Tests 5904 and 5905 are released at the same time and reporting aspects are combined.

Enrollment deadline: 15 March 2025