A person's gut bacteria and skin microbes are unique to each individual.
A Jewish Polish-born immigrant named Aaron Kosminski has been implicated.
Technology could play a key role in identifying the executioner.
That fancy graphics card has fingerprints.
A Dutch artist creates nearly bulletproof human skin by sandwiching spider silk between the epidermis and dermis.
Modern DNA testing could give names to eight unidentified victims of John Wayne Gacy.
Soon, law enforcement officers will be able to search by photo without having a name.
Dusting for fingerprints could get more accurate with a new technique that makes them glow.
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