KANSAS CITY, Kan. (AP) — Wyandotte County authorities say a man already serving a life sentence for murder has pleaded guilty to killing a woman in Kansas City, Kansas, in 1997.

Deputy District Attorney Sheryl Lidtke said in a news release 34-year-old Torry Johnson pleaded guilty Friday to first-degree murder in the October 1997 death of 33-year-old Vicky Ernst inside her Wyandotte County home.

The crime went unsolved until prosecutors and detectives turned up new evidence during a case review. Johnson and Jason L. Rucker were charged in April.

Johnson, who will be sentenced Oct. 16, is serving a life sentence in Missouri for the 2005 killing of a man in Kansas City.

Rucker is being held on $1 million bond in Wyandotte County while his case is pending.