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Forensic Entomology Classification of Insects • • • • • • • Kingdom Animalia Phylum Arthropoda Class Insecta Order Coleoptra Diptera Family Genus Species Diptera (Fly) • Head-compound eyes, antennae, sucking mouthparts. • Thorax – two pairs of jointed legs, one pair of transparent wings. • Abdomen – one pair of jointed legs. Coleoptera (Beetle) • Head-compound eyes, antennae, biting mouthparts. • Thorax – six pairs of jointed legs, and two pairs of wings (the fore wings are hardened). • Abdomen Entomology in Forensics • Child abuse – insect stings as punishment • Elderly neglect – insects in wounds • Accident investigations – insect wounds as cause of accident, or insect impact angle in accident reconstruction Entomology in Forensics • Blood spatter – cockroaches tracking blood up to the ceiling. • Drugs – insect fecal matter on controlled plants can identify country of origin. • Necrophagous (carrion) – insects that feed on human remains Entomology at the Crime Scene • Time of death – species succession (for long periods) or genus regression (for shorter periods). • Movement of the body – insect species are specific to regions and habitats (indoors vs. outdoors or urban vs. rural). • Freezing or wrapping the body – insect species succession is altered due to temperature preferences and ease of access. Entomology at the Crime Scene • • • Victim is incapacitated – presence of urine or feces will attract insects that are not normally attracted to remains. Blood feeding insects – DNA can be recovered from a blood sucking insect which connects the suspect to the crime scene. Toxicology – if the remains have no soft tissues available for toxicology tests, a toxicology screening can be run on the insects that are found feeding on the victim.