FSC239Y5 Lecture Notes - Bioaccumulation, Myiasis, Mayfly

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Use of insects in legal investigations: civil and criminal investigations. Determine elapsed time since death or postmortem interval (pmi) Accurate, sometimes only method available after 72 hours. China (13th century), europe (1850s), britain (1930s), north america (1970s), canada (1992) Less than 35 forensic entomologists world-wide, 10-15 usa, 2 in canada. Focus police investigation into correct time frame: identification of victim (missing persons records), make or break alibis (define list of suspects, exonerate innocent) Two methods: maggot age and development (up to 2 months after death, accurate to hours, days, weeks), successional waves of insects (2 months to several years after death, accurate to weeks, months, years) Immature stages of: blow flies (calliphoridae), flesh flies (sarcophagidae), house flies (muscidae) Lay eggs on wounds or natural orifices. 3 stages: first instar (2mm, 1 breathing slit), second instar (2 breathing slits), third instar (feeding machine! 3 breathing slits) ---wandering stage (stop eating and leave the body)

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