William Edward Harkins Jr., 83 years-old, was last seen at 6525 Belcrest Road in Hyattsville around 2:00pm on Monday, August 18.
Police say Harkins suffers from dementia. He was last seen wearing a light tan shirt, blue jeans, and brown sandals.
Anyone who has seen him is asked to call police at 301-985-5060. Reference case #14-2259.