A man who gunned down two people including a U.S. Forest Service officer was wanted for failing to show up for an August meeting with his probation officer.
The gunman, Shawn M. Roe, 36, was killed in a shootout with authorities.
The probation officer had requested an arrest warrant for Roe, but Mason County Superior Court had not issued one, the Seattle Times reported.
Authorities are investigating the shooting of Officer Kristine Fairbanks, 51, and Richard Ziegler, 59, a retired California corrections employee.
Roe was pulled over while driving a stolen truck about 50 miles west of Seattle.