Robert Warren Peterson was 54 when he was last seen in Riverside County, California, on June 6, 2016. He’s described as a white male with gray hair and hazel eyes, standing 6 feet 4 inches and weighing about 180 pounds. At the time he disappeared he was wearing a brown or maroon shirt and blue basketball shorts.

Authorities have said Peterson has been diagnosed with dementia and is considered to be at risk. Few details about the circumstances of his disappearance have been released publicly. The Riverside County Sheriff’s Department is the investigating agency and his case remains open and he is still listed as a missing person.

If anyone knew Robert, saw him in Riverside County around June 6, 2016, or has information that could help locate him, please contact investigators.