Robert Johnson, 65, was last seen in San Francisco on October 23, 2017. He has Alzheimer’s disease and is considered at risk. He is a white male, brown hair, blue eyes, 5 feet 8 inches tall and 230 pounds; born February 18, 1952. He is also known as Robert Gustaf Potts and by the nickname Gustaf. The San Francisco Police Department is handling the case under case number 170869154, and the State of California Department of Justice still lists him as missing.

Does anyone have information about where in San Francisco he was last seen or who might have been with him that day?