Post-mortal lesions in freshwater environment.

Area of Science:

• Forensic Science
• Marine Biology
• Taphonomy

Background:

• Postmortem animal activity can alter decomposition evidence, complicating injury interpretation.
• Limited data exists on postmortem lesions caused by aquatic organisms, especially crustaceans.
• Understanding these effects is crucial for accurate forensic investigations.

Observation:

• This study reports the first documented case of crustacean colonization on a human body post-death.
• The amphipod Niphargus elegans was observed causing injuries to the face, particularly the eye region, of a drowning victim.
• Lesions were noted within hours of death, indicating rapid colonization.

Findings:

• The observed lesions caused by Niphargus elegans are comparable to those inflicted by ants.
• Amphipods demonstrate dietary plasticity, enabling colonization of submerged bodies.
• Benthic behavior suggests a greater role in colonizing bodies during submersion phases.

Implications:

• Crustacean activity must be considered in postmortem injury analysis, especially in drowning cases.
• These findings expand our understanding of aquatic invertebrate interactions with decomposing remains.
• Accurate identification of postmortem aquatic lesions aids in determining time since death and cause of death.