Participants analyze and identify a variety of bloodstain patterns. Test material is available in two test formats (photo or digital download). Samples ship in June.

Participants determine the entrance hole and directionality of a bullet hole; they also have an option to report horizontal and vertical angles as well as methodologies. Samples ship in August.

Participants determine the BAC of four human blood samples. Samples ship in August. Review test info for special instructions for non-U.S. laboratories.

Participants evaluate drugs/metabolites in human or animal blood with case-like concentrations. Samples ship in April. Review test info for special instructions for non-U.S. laboratories.

Participants evaluate THC/THC metabolites in human blood with case-like concentrations. Samples ship in September. Review test info for special instructions for non-U.S. laboratories.

Participants evaluate drugs/metabolites in human urine with case-like concentrations. Samples ship in March. Review test info for special instructions for non-U.S. laboratories.
 

Participants use simulator solutions of ethanol in water to evaluate their breath alcohol instruments. Samples ship in May.

Participants use NIST traceable reference material dry gas cylinders to assess the calibration of their breath alcohol instrument. Samples ship in July. Available to U.S. laboratories only.

Participants screen samples for body fluid(s) and analyze samples for DNA. Known bloodstain standards are provided on cloth substrates. Samples ship first week in January. (Screening/STR/YSTR/Mito)