An Omaha man who served prison time for killing his wife in 1998 is wanted in the deaths of his parents and a niece, police said Wednesday.

A first-degree murder warrant has been issued for John Dalton Jr., 46, who remains at large, police said.

Officers responding Tuesday to a report of shootings found three bodies in a northeast Omaha home. Police identified the victims as John Dalton Sr., 70; Jean Dalton, 65; and 18-year-old Leonna Dalton-Phillip.

Court records indicate this is not John Dalton Jr.’s first involvement with the law. He was charged with second-degree murder in the September 1998 fatal shooting of his wife, Shannon Dalton.

After the shooting, Dalton fled to Tennessee, where he was captured a few days later, police said. He made a deal with prosecutors and was imprisoned in late 1999 after pleading guilty to manslaughter and other crimes. He was paroled in 2010.

His criminal record also includes convictions for delivery of cocaine and leaving the scene of an accident and fleeing to avoid arrest in the early 1990s.