It was after 3:30 a.m. when the burglar alarm went off at Mark Hayes’ far south Chicago home. Waking up to investigate the commotion, he was barefoot and unarmed when he spotted an intruder in his garage. USMC veteran Hayes called out to his wife, who brought him his shoes. And a filet knife. Then the burglar attacked Hayes with a hammer. The intruder, 52 year-old career criminal Harold Cornell, quickly learned that a Marine with a knife is a very dangerous man.
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