/*Maksim Gelman*/ was ringed by guards as he appeared Tuesday in /*Brooklyn*/ court. He is being held without bail.
He had already pleaded not guilty to assault and attempted murder in Manhattan, where he was tackled and arrested by police on a subway train near Times Square.
Authorities say Gelman went berserk two months ago after his stepfather wouldn't let him borrow his mother's car.
He's accused of stabbing him to death, then making off with the car, going to the home of an acquaintance and killing her and her mother. He's also accused of running down a pedestrian, carjacking and other violence.
