To accurately reconstruct events related to bloodshed, the observation of bloodstain patterns on clothing can be crucial. Photographic techniques have a noninvasive effect on appearance and biological integrity. Nonconventional photography techniques, such as infrared photography can be used to increase the contrast in the appearance of blood against some types of backgrounds. This article begins with a discussion on the theory of infrared photography in bloodstain cases and continues with the application of the procedure, observations and pattern interpretation, and exposure and development. Results using the infrared films were dramatic. The technique appeared to work best with solid, dark colors, because color patterns caused interference with the stain visibility. Konica film appeared sharper with less granularity than the Kodak film. References