Douglas Castleman (pictured), 47, was last seen about 10:30 a.m. Wednesday walking away from his home in the 800 block of West Brannan Island Road. He is considered to be at risk because of a medical condition, according to a Sheriff's Department news release.
Castleman is described as white with brown hair and brown eyes. He is 6 feet 2 inches tall, weighs about 200 pounds and was last seen wearing a black jacket, white polo shirt and white tennis shoes.
Anyone with information regarding his whereabouts is asked to call the Sheriff's Department at (916) 874-5115.