When gambler Scott Martinez, 47, is found eviscerated by a sword in his La Mesa, CA home, investigators can't tell who is telling the truth within his inner circle. It will take 13 years and an advance in DNA analysis to find his killer.

When Susan Woods, 30, is found beaten and drowned in her tub in America's Cowboy Capitol, suspicion falls on her estranged husband. With a suspect's DNA in hand, detectives go back to the basics to unmask a killer-cowboy living in plain sight.