Decades after two small town murders led to dead ends, a powerful new DNA technology has helped solve them, opening the door for a new era in criminal investigations. ABC News and 20/20‘s David Muir gets exclusive interviews with the families, law enforcement, and the state-of-the-art lab that is changing the game, then takes us along as they zero in on two murderers to deliver long-awaited justice. Airing 9pm ET on ABC’s 20/20. Streaming Saturday, March 8th, on Hulu.
20/20: The Code Breakers
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