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.
3 Minuten
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When detectives hit dead ends, science paves new paths.
Beschreibung
vor 11 Jahren
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.
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