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Traces of a Serial Killer

When BTK started killing, using DNA evidence wasn't the norm. But 20 years later, tiny traces of DNA left on his first victims could be enough to bring him to justice.

FROM Catching Killers: DNA Profiling

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Traces of a Serial Killer

Traces of a Serial Killer

When BTK started killing, using DNA evidence wasn't the norm. But 20 years later, tiny traces of DNA left on his first victims could be enough to bring him to justice.

FROM Catching Killers: DNA Profiling

The Fastest Punch in the World

Mantis Shrimp have a knockout punch, delivering a killer blow as fast as a 22-caliber bullet.

FROM Speed Kills: Ocean

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The Fastest Punch in the World

The Fastest Punch in the World

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