Post-mortem intervals estimation by determination of insect diversity

ABSTRACT

Dipteran flies have been employed to measure the post-mortem period examination with the help of decomposition of the carcasses. The current study attempted to update the baseline data of the insects to determine the post-mortem interval. Five decomposition stages were observed but the complete decomposition of (Oryctolagus cuniculus) rabbits in winter took place in 21 days and in spring in 12 to 15 days. Decomposition period in both trials varied due to temperature fluctuations. Odours were released at different stages of decay and blow flies were the first insect to come on carcasses. The species that identified were the blowfly (Calliphoridae) (34.4% | 49.12%), blue fly (Calliphora) (17.24% | 41.22%), flesh fly Sarcophagidae (20.68% | 5.26%), and house fly (Muscidae) (27.58% | 4.38%) in the first trial and second trial respectively. The timing of the various arthropod species’ arrivals and their correlation with various decompositional phases throughout both trials suggested that they could be useful for determining the PMI (post-mortem interval) in forensic investigations. This study showed that insect fauna on the corpse is a tool for estimating post-mortem interval and plays an important role in forensic entomology to analyse the suspicious suspect.

KEYWORDS:

• Decomposition stages
• rabbit carcasses
• fly succession
• environmental factors
• suspects

Disclosure statement

No potential conflict of interest was reported by the author(s).