Two Novel Methods for Enhancing Postmortem Fingerprint Recovery from Mummified Remains

Abstract

Postmortem fingerprint collection is a routine part of many forensic death investigations. Although the production of postmortem prints is usually straight forward, several obstacles and scenarios can make the collection difficult. A common challenge occurs when finger pads are mummified. Several current techniques allow for softening and rehydration of mummified finger pads; however, despite the employment of such techniques, the production of adequate postmortem fingerprints can remain elusive. The authors present two techniques that can improve the chances of obtaining suitable fingerprints from mummified remains. The "baby powder method" involves applying a cornstarch-based powder, such as baby powder, onto the darkened and mummified finger pads, to allow better visualization of the fingerprint detail. The "transillumination method" involves carefully dissecting away the tissues underlying the finger pad, followed by placement of a bright light source underneath the finger pad, such that the finger ridge pattern is illuminated.

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