NEW YORK (Reuters) - A $100 million lawsuit claiming that NBC prompted the suicide of a former Texas prosecutor who was caught up in its popular sting series "To Catch a Predator" is moving ahead after a ruling by a U.S. federal judge on Tuesday. Louis Conradt, a 56-year-old assistant district attorney, shot himself in November 2006 after he was confronted at his Terrell, Texas, home by police officers. They were accompanied by an NBC news crew that was there to film his arrest."To Catch a Predator," a segment of NBC's "Dateline" newsmagazine program, lures men to a house with...