Bloodline Detectives, a new true-crime documentary series, hosted by preeminent legal analyst and renowned former prosecutor Nancy Grace, takes viewers behind the scenes of cold cases as detectives solve years-old murder investigations using two kinds of technology: genetic genealogy and familial searching. Detectives can harness these techniques to pinpoint an unknown criminal’s relatives and then trace their “bloodline” or family tree to reveal the killer, as used in high-profile cases such as The Golden State Killer and The Grim Sleeper.

Streaming now. Watch the complete first season, free on YouTube:
   • Bloodline Detectives - Episode 1 - De...  

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