Investigators make arrest in 25-year-old cold case

Authorities used the same technology that helped detectives make an arrest in the Golden State Killer case.
1:36 | 06/27/18

Coming up in the next {{countdown}} {{countdownlbl}}

Coming up next:



Skip to this video now

Now Playing:


Related Extras
Related Videos
Video Transcript
Transcript for Investigators make arrest in 25-year-old cold case
Stunning development in the murder of a sixth grade teacher 25 years ago. Tonight and arrested authorities say they used a family genealogy web site to make that arrest here's ABC's Lindsey Davis. Tonight a break and a cold case that had Pennsylvania investigators stumped for more than 25 years. Bring the row known as DJ freeze feature here an event video on his web site is now under arrest for the murder of Christy mere act. The sixth grade teacher who was sexually assaulted and strangled in her Lancaster home back in 1992. He's been free longer than she lived her entire life. Investigators say they use the same technology that cracked the case of the Golden State killer. Eleven Virginia created a genetic profile from crime scene DNA then uploaded it to a public genealogy database. After finding relatives police zeroed in a Monroe and say they then match the DNA after he discarded gum and a water bottle. Police are thanking the land Terrell say look we're in a row seems like a pretty strong suspect for you. Eats a cutting edge genetic tool now heating up the coldest of cases. Last week police in Tacoma Washington arrested Gary Hartman for the 1986. Rape and murder. Of twelve year old Michelle a Welch Hartman has pleaded not guilty. That same UN connected crime scene DNA to Hartmann through genealogy web site. Pure criminal and you Fletcher DNA at the scene. You might as well turn yourself in now we will capture. As good a case in Pennsylvania prosecutors there say they will likely seek the death penalty. David. Twenty thank you.

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

{"duration":"1:36","description":"Authorities used the same technology that helped detectives make an arrest in the Golden State Killer case.","mediaType":"default","section":"ABCNews/WNT","id":"56185106","title":"Investigators make arrest in 25-year-old cold case","url":"/WNT/video/investigators-make-arrest-25-year-cold-case-56185106"}