Joseph Hopfenspirger, 32, was last seen around 9:30 p.m. Monday at an unknown location while making threats to harm himself.
He is a white man with brown hair and blue eyes. He is about 6 feet tall and weighs about 185 pounds.
Police say he may be in a 2010 black Chevrolet Silverado truck with Texas license plate number DHL8516.
Anyone with information on Hopfenspirger’s location is asked to call the Dallas Police Department at 214-671-4268 or 911.