William Allen Schwartz, 65, of Rialto, California, was found with a gunshot wound to his abdomen inside a motorhome in the wash area south of the Rosena Ranch community on October 9, 2021. Rialto police responded to a call about the shooting around 5:30 a.m.; paramedics pronounced Schwartz dead at the scene. Authorities immediately classified the death as a homicide.

Early in the investigation there was no description of a suspect and no clear motive. Despite continued work by the Rialto Police Department, no arrests were announced and public appeals for tips were issued as the case remained open. Few concrete leads or witnesses were reported, and the investigation stalled in the years afterward.

Does anyone who lived near Rosena Ranch or who was in the area that morning have information that could help solve this homicide?