Stephen Donald Mount was 23 when his body was pulled from the Willamette River near the east bank just south of the Steele Bridge in Portland, Oregon. He was found partially submerged on July 2, 1979; police recovered him after a report of a body in the water around 12:55 p.m., and investigators determined he had died of homicidal violence.

Detectives learned Mount may have been involved in an altercation the night before his body was found. Witnesses said they saw him in a dispute with two Hispanic men, but those accounts lacked detailed descriptions and produced no clear leads. No arrests have been made and no suspects have been definitively identified.

The Portland Police Bureau Cold Case Homicide Unit is handling the investigation and a cash reward is being offered for tips that lead to an arrest. If anyone remembers seeing Mount that night, the Steele Bridge area the following morning, or has information about the men involved, please come forward.