Police to reveal identities of 2 victims in Texas 'Killing Fields' case

Thanks to the use of genealogy, the public will finally learn the victims' identities after over 25 years of mystery.
2:30 | 04/14/19

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Transcript for Police to reveal identities of 2 victims in Texas 'Killing Fields' case
We do want to turn now, though, to a break in a decades-old murders. In one Texas town. Women found in the infamous killing fields, never identified until now. ABC's Zachary kiesch is here. How did investigators figure out who these women are? Reporter: Good morning to you. It's called snapshot DNA phenotyping. It's given detectives key insights into their genealogy. In determining who they are. Until now, has been unknown. It's a huge comfort today to finally have real name. Reporter: Jane and Janet doe for decades that's how they have been know. But tomorrow, after 25 years of investigations and the use of genetic genealogy, the public is learning their identities. Authorities are already notifying the two victims' families of the discovery. When all this start, it was emotional. You know, we hoped for the best. It just didn't turn out that way. Reporter: The remains were found in what has been dubbed Texas killing fields, where 30 women bodies have been found since the 1970s. The body of Heidi was found in the field in 1984. Two years later, they discovered Jane doe's remains in the same area. The same day, as the body of Tim Miller's 16-year-old daughter Laura. I have been out here hundreds of times and cried gallons of tears. Reporter: Janet doe's remains also found in this field in 1991. No arrest have been made in the deaths of these four women. I would come out here at 2:00 in the morning, at noon, I wanted to see who was coming in and out. Reporter: These notorious fields even inspired a 2011 film. She's in the fields, she's as good as gone. Reporter: Many are hoping this remarkable breakthrough will lead to more answers. Including author Kathryn Casey. Knowing who they are may aid in the investigation of trying to find their killer. Police will hold a press conference Monday announcing the names and bringing some closure to these families. The new technology has been extraordinary as well. Some of the things with genetic genealogy and DNA. Could come into play. Absolutely. Zachary, thank you. Time now for weather and rob Marciano.

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

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