WARRINGTON, ENGLAND - FEBRUARY 13: Police forensic scientists attend the scene where 16-year-old Brianna Ghey was found with multiple stab wounds on a path at Linear Park in Culcheth on Saturday on February 13, 2023 in Warrington, England. Two local teenagers have been arrested on suspicion of her murder.
Forensic investigations rely on clues left by the environment, and climate change is altering a lot of what was considered baseline information about our natural world. In the first episode of CSI: Crime Scene Investigation, fictional entomologist Gil Grissom arrived at a crime scene and used tweezers to pull a maggot out of a dead body. Within moments, he announced that the age of the maggot indicated that the body had been dead for seven days.
Fictional entomologist Gil Gibson on the TV show CSI holds up third-stage larvae before declaring that the body at the scene has been dead for seven days — a simplification of the work real-world scientists do in a death investigation. "We have two days of heat, of nice weather, and then thunder and storms and heavy rain," said Jens Amendt, a professor at the Institute of Forensic Medicine in Frankfurt am Main, Germany, describing recent weather where he lives.
Entomologists can use insects to detect whether a body found in the woods was moved post-death. the normal ranges and migration patterns of many creatures are shifting. This makes bodies unappealing to insects like the blowfly which need "fresh and wet tissue," said Amendt.When police can't determine the identity of a body based on ID or other personal items, they sample DNA – but DNA databases are limited, which can leave investigators at a dead end.
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