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OXON HILL, Md. (WUSA) -- Police need your help finding a "critically missing" senior citizen from Prince George's County.

Leander Cooper, 73, of Oxon Hill "was last seen July 22nd, at 7:00 a.m., leaving his residence located in the 1400 block of Birchwood Drive in Oxon Hill. Cooper drove his wife to the Washington Hospital Center, located in the 100 block of Irving Street, N.E. in Washington D.C., where they arrived at 8:00 a.m. He dropped off his wife at the hospital but never returned," Prince George's County Police said in a news release.

Cooper is described by police as a black male with a dark complexion, 5'10", 220 pounds, black and gray hair, and may be wearing eyeglasses. He suffers from dementia and high blood pressure.

Police say Cooper was last seen driving a 2006 silver Chevrolet Trailblazer with Maryland tags 725M494.

If you have any information about Cooper, call (301) 749-5064.