Environmental DNA (eDNA) is increasingly being investigated by forensic scientists as a tool to help solve criminal cases that lack biological traces—and attention is also turning to collecting trace airborne eDNA left behind by intruders in residential burglaries.
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Criminals are generally not smart enough but I would think the way around this is to sneak into the HVAC room of a mall or any place that hosts lots of people and scrap off some filter dust. Bonus points for going full Gattaca and thoroughly cleaning before the crime…