[Science] Bacteria could identify month-old suspicious stains at crime scenes – AI

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Trace stains can be difficult to identifyRafe Swan/Getty By Clare WilsonStains at crime scenes can sometimes be hard to identify, but the unique combination of bacteria they contain may help. Large splatters of blood at a crime scene can be self-evident, but investigators sometimes need to work out if tiny stains are significant. “If you see something that looks like a trace, you want to know if it’s important,” says Natasha Arora, of the Zurich Institute of Forensic Medicine in Switzerland. Luminol spray can reveal blood spots, but it isn’t a definitive test, as it can cross-react …

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