Photo Illustration by Luis G. Rendon/The Daily Beast/ShudderWhen the National Highway Traffic Safety Administration mandated standard inclusion of rear backup cameras in automobiles made after May 2018, the bureaucrats in charge had safety at the top of mind. Innovation in the art of the kill, one of horror cinema’s most cherished mores, probably didn’t factor into the agency’s decision. But five years after the fact, Joe Lynch figured out how this stock feature in today’s cars could facilitate