Decoding ant activity patterns in a rare anesthetic drug fatality: A case report

Postmortem activity by necrophagous insects, particularly ants, usually produces yellowish, hard, small excoriated skin lesions with serpiginous margins that lack bleeding. However, in rare cases, they can cause extensive bleeding and produce unusual skin lesions, particularly in deaths due to asphyxia, which may raise suspicion of foul play. This can also make it difficult to differentiate between postmortem and antemortem injuries during forensic examinations.

A 26-year-old Indian male anaesthesiology resident was found dead in his hostel room, having allegedly self-administered a lethal dose of propofol following his night shift. The autopsy revealed numerous small, irregular lesions with serpiginous margins and extensive postmortem bleeding on the exposed areas of the body, displaying patterns that were unusual for typical ant activity.

The observed bleeding patterns, including droplet, stripe, and pool formations, as well as their combinations, are influenced by factors such as the cause of death, blood fluidity, body position, pooling of blood, and ant species. In this case, these patterns initially raised suspicions of foul play. However, a thorough postmortem examination by expert forensic pathologists, who had prior knowledge of such findings, and the exclusion of any external or internal injuries led to the conclusion that the lesions resulted from postmortem ant activity rather than antemortem trauma.

This case report examines the various patterns and forensic challenges associated with postmortem ant activity in a death caused by asphyxia due to a fatal propofol overdose.