Officials say James Kocurek suffers from memory loss and diminished speech because of his battle with brain cancer.
Kocurek, who goes by Nathan, was last seen on a neighbor's security camera around 7:30 Wednesday morning near East Morton Road.
The missing man is described as being 5-feet-11-inches tall with a weight of 175 pounds.
Police say he was seen wearing a navy blue Carhartt jacket, blue jeans or sweatpants, and possibly a Georgia Tech navy blue baseball cap.
Anyone with information that could help investigators, please call 911.
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