Transcript for Possible break in decades-old murders of young girls
We'll continue with that possible break in a cold case in Michigan. Police searching the woods for a young girl missing since 1979 and now they believe a total of six girls could be buried in the area. ABC's Eva pilgrim is there on the scene for us this morning. Good morning, Eva. Reporter: Good morning, robin. It's an unsolved mystery. Several missing girls just outside of Detroit, a tip leading investigators here. Now, authorities are digging searching for bodies, possible murder victims they say could be linked to a convicted killer. This morning, a cold case turned red hot. Investigators in Michigan tipped off that this may be the burial site of up to six young girls some missing for almost four decades. One of those girl, Kimberly king who vanished in 1979. The 12-year-old last seen in her best friend's backyard. Kim actually like hopped the back fence and didn't go home and then I just went in my house. So the next morning I was expecting her to be back at my house. Reporter: Police think king and the other five girls were killed by this man, Arthur ream, the child predator already in jail for the 1986 kidnap age murder of 13-year-old Cindy Zarzycki. This video shows ream pointing police to the location of her remains. All she had to do was go up north avenue and it's right there. Reporter: Ream giving the detectives details this this chilling interrogation video. Was she wearing a purse? Yeah. Reporter: Zarzycki found in these woods ten years ago but the site not fully searched. This empty open field once hiding in the woods. So in the '80s, this was woods. All wood, farmland. There was nothing out here back then. Reporter: Police say Kelly, Bradley and Kim yaro could also be found there. Hopefully bring closure. Reporter: Kimberly's sister Connie will never stop looking? It's the most important thing until we find her. Reporter: Now investigators have interviewed Arthur ream several times since this case was re-opened. They have said he failed a polygraph test but heavy not said what the specifics of that test were. Robin. All right. Eva, thank you so much.
This transcript has been automatically generated and may not be 100% accurate.