Barty Crouch Jr Revealed | Harry Potter and the Goblet of Fire
It was Barty Crouch Jr imposing as Mad-Eye Moody who put Harry’s name in the Goblet of Fire. That was only in the movie. It was Barty Crouch Jr. It could not have been Karakoff because Voldemort says that he had a loyal death eater at Hogwarts right now when he got his body back.