Green River killer: I killed 80 victims over 2 decades, KOMO report

[FILE] Green River Killer Gary Ridgway signs papers during his arraignment on charges of murder in the 1982 death of Rebecca "Becky" Marrero, Friday, Feb. 18, 2011, at the King County Regional Justice Center in Kent., Wash. Ridgway already confessed to killing Marrero as part of a 2003 plea deal that spared him the death penalty. (AP Photo/Elaine Thompson)

September 18, 2013 8:45:52 AM PDT
Green River killer Gary Ridgway said he killed around 80 women during two decades. The serial killer, who is currently behind bars at a Washington State penitentiary, said he wants to confess to more.

Ridgway spoke with ABC News affiliate KOMO reporter Charlie Harger in an exclusive interview . He said he wants to help the victims' families find their remains and closure.

"You can't go back and change the past; it's over with," Ridgway said to KOMO. "All we can do is try to make it better."

Ridgway confessed to picking up prostitutes and runaways in the 1980s and 1990s in Washington state. He would strangle them during sex, according to his confession, and dump their bodies near the Green River.

Ridgway pleaded guilty to 49 murders and is serving life in prison for those. He said the actual number is closer to 75 or 80, KOMO reports.