This test is still open for enrollment via credit card only. Please select credit card as the payment method during the checkout process if your order includes any Late Order Purchase (LOP) tests.

These tests involve the examination and comparison of questioned footwear impressions to known shoes. A variety of substrates (such as paper, tile, wood, and drywall) are combined with different imprint media (blood, ink, paint, etc.) for examination and comparison. Samples consist of high-resolution images of questioned imprints/impressions, inked known exemplars of the suspect shoe sole(s), and the suspect shoe sole(s). Results are reported using the SWGTREAD 7-point scale of conclusions.

The images are the same for all formats.

Test 5331 consists of physically printed images.

Response forms for Tests 5331 are only available on www.cts-portal.com.

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

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

LOP enrollment deadline: 1 February 2025