Murderer executed in 1999 identified through DNA as man behind woman's 1979 cold case

A killer and rapist who led police on "the biggest manhunt in Texas history" has been identified as the man behind a 1979 cold case killing in Portland.
1:41 | 02/01/19

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Transcript for Murderer executed in 1999 identified through DNA as man behind woman's 1979 cold case
In Marie loft go it was twenty years old she had just gone off work on July 24 1979. Police say that evening Jerry Walter McFadden sexually assaulted her and strangled her with an alarm clock court. Hours later the woman's sister discovered in Marie's body. And for decades the loft of fame we waited for her killer to be coughed but I assured her that we would continue to pursue. Different technology that is hopefully gonna come available in the future that future is now but for those involved in this case solving it doesn't lessen the pain. Of losing Emory I don't think it ever goes away from them. I think there were closures or is that just having some answers to give them get. We see a sample from underneath in a Marreese finger tip. Gave them the DNA profile that eventually brought them to the killer Sheen was the one that led us to her Keller. The state of Texas ex acute McFadden twenty years ago but the state didn't keep a record of his DNA which would've solve this case years ago. Last spring police in California. Used a private service that used a genealogical data bits and arrested a man. They say is the Golden State killer wanted for thirteen murders. Detectives with Portland's cold case unit then use that same technology which led them to McFadden this case never went unsolved we never would have. Risen to the levels. There's no record here. McFadden was out on parole when he murdered laughter Texas police convicted him of kidnapping and rape being a teenager months after the organ crime. And at this time police here don't know how long he was in the Pacific northwest in the summer of 1979. Or what other crimes he may have committed.

This transcript has been automatically generated and may not be 100% accurate.

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