LT. CHARLES MARGIOTTA, 44, of New York, a firefighter for the New York Fire Department, was a stuntman in dozens of feature films, including “Hannibal.” He also was a private investigator, a substitute school teacher, a soccer coach, a father, a husband, a hunter. “He wasn’t happy unless he was doing four things at once,” said his brother, Michael. The tattooed, musclebound 240-pounder was a tough guy but wasn’t one-dimensional; he had a degree in English and sociology from Brown University. “He was the champion of the underdog,” Michael Margiotta said. “If you were the kid nobody wanted in a choose-up game, you wouldn’t be his last pick. You’d be his first pick.”