Estimation of post-mortem interval based on insect species present on a corpse found in a suitcase

Area of Science:

• Forensic Entomology
• Forensic Science
• Crime Scene Investigation

Background:

• Concealing bodies in zipped suitcases alters insect colonization patterns, complicating postmortem interval (PMI) estimation.
• Understanding insect succession on concealed remains is crucial for accurate forensic investigations.
• Previous research indicates that certain fly larvae can penetrate even sealed containers.

Purpose of the Study:

• To estimate the postmortem interval (PMI) of a female corpse discovered in a sealed suitcase.
• To identify insect species present on concealed remains and analyze their succession patterns.
• To determine the season of death based on the collected entomological evidence.

Main Methods:

• Collection and identification of insect evidence (larvae, pupae, empty puparia) from a body found in a zipped suitcase.
• Comparison of identified insect species with known colonization patterns on exposed and concealed carrion.
• Estimation of the minimum postmortem interval (PMImin) based on insect developmental stages.

Main Results:

• Insect evidence included pupae/puparia of Chrysomya nigripes, Fannia canicularis, and larvae/pupae/puparia of Megaselia scalaris, Hermetia illucens.
• The estimated minimum postmortem interval (PMImin) was 56 days.
• Absence of common blowflies (Chrysomya megacephala, C. rufifacies, Lucilia sericata) suggested delayed colonization and a potential winter death.

Conclusions:

• Insect evidence from concealed remains can provide reliable PMI estimates and seasonal indicators.
• The specific insect assemblage indicated the victim likely died in winter, which was later corroborated.
• This case highlights the importance of forensic entomology in cases involving hidden or concealed human remains.