These tests contain two sections: angle of impact and pattern description. The angle of impact section requires the analyst to determine the angle at which blood has impacted the target surface. The pattern description section requires the analyst to recognize, identify, and describe patterns on bloodstained targets. The samples are available in a choice of physically printed images or as a digitally downloadable file.

The images are the same for all formats.

Test 5601 consists of physically printed images and Test 5605 is only available online as a digitally downloadable file.

Test 5605 images are transmitted via a digital download from a zip folder (.tif format). Due to large file sizes, advanced photo image software may be required to open and view these images. Participants are not limited to conducting only on-screen comparisons and may employ any other method. However, because of differences in printing technology, CTS cannot guarantee the quality of images printed from the digital media.

Response forms for Tests 5601 and 5605 are only available on www.cts-portal.com as well as the test samples for Test 5605. The information necessary to access the test materials will be provided via e-mail to the primary contact on file on the day of the test release.

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

Test materials ship/are made available in May. All formats are released at the same time and contain the same images; reporting aspects of all formats are also combined.

Enrollment deadline: 15 March 2025