Terry Don Knowlton, 48, was last reported seen in San Bernardino, California on December 28, 2020. The San Bernardino Police Department is listed as the investigating agency, but the publicly shared profile offers no detailed timeline of his last-known movements, companions, clothing, vehicle status, or specific investigative leads.

A separate June 2025 public report describes an At Risk/Missing Person alert for a Terry Knowlton in Banning, California, last seen near Alutra Place and West George Street wearing a gray T-shirt and blue jeans and believed to be on foot. That account does not use the full name Terry Don Knowlton and cannot be treated as a confirmed update to the December 2020 San Bernardino report on its own. The California Department of Justice entry cited for the listing currently shows a record was not found.

If anyone has information about Terry Don Knowlton’s whereabouts in December 2020 or afterward, please contact the San Bernardino Police Department.