Experts recruit bed bugs as crime scene sleuths

Under glaring laboratory lights, a research assistant extends his forearm and carefully inverts a mesh-topped container onto his skin to allow a wriggling mass of bed bugs to feed on his blood, all in the name of science.

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Long-loathed as itchy household pests, the bloodsucking insects have revealed a darker, more intriguing potential as Malaysian scientists have discovered they can be turned into unlikely crime-busting allies.

A team from the Science University of Malaysia (USM) in northern Penang has found that tropical bed bugs can retain DNA from human prey for up to 45 days after snacking on an unwary victim.