Driver who plowed into 4th of July crowd in suspected DUI was a substance abuse counselor

The driver of a pickup truck that fatally plowed into a group of revelers celebrating the Fourth of July at a New York City park Thursday evening was a substance abuse counselor who penned a book on helping others overcome addiction, according to law enforcement sources Daniel C. Hyden, 44, of Monmouth Junction, New Jersey, was identified Friday as the driver who struck revelers at Manhattan's Corlears Hook Park in Manhattan.