NCJ Number
228749
Journal
Forensic Magazine Volume: 6 Issue: 5 Dated: October - November 2009 Pages: 18-22
Date Published
November 2009
Length
5 pages
Annotation
This article provides a detailed description of the "roadmapping" technique that allows for the complete photo documentation of bloodstain patterns at a crime scene.
Abstract
The "roadmapping" technique was developed by Toby L. Wolson of the Miami-Dade Police Department's Crime Laboratory. The procedure involves the use of overall, medium, and close-up photographs of bloodstains, combined with labels and scales. Separate pattern groups are identified and labeled; important stains within that group are then further identified and labeled accordingly. The labels and scales act as "road signs" in the photographs, ensuring that viewers are properly directed in their analysis. Using this technique allows other analysts to view and understand the photographs without having to be present at the crime scene. In performing the "roadmapping" technique, the following equipment is needed: yellow paper (disposable) photographic scales (vertical and horizontal, 8' x 8'); adhesive mapping symbols; adhesive scale (50mm/2 in.); and glue or tape. A five-step procedure is outlined. First, identify the patterns to be documented and photograph them as they are. Second, apply the yellow scales with tape of glue, so that they surround the pattern both horizontally and vertically. Third, label each separate pattern with an adhesive mapping symbol (e.g., A, B, C, etc.). Fourth, pick out the important individual stains within each pattern and label each stain with an adhesive scale (e.g., A1, A2, A3, etc.). Fifth, take the overall, medium, and close-up photographs of each pattern until the scene has been fully documented. This technique can also be used in analyzing bloodstains on clothing. 7 sample photos and 4 references