Barty Crounch Jr.
Wikipedia
Harry Potter Character Guide
Barty Crouch Jr. was captured with Bellatrix Lestrange and Rodolphus Lestrange, who tortured Frank and Alice Longbottom, parents of Neville Longbottom, into insanity. His father, Barty Crouch Sr., who headed the Department of Magical Law Enforcement at the time, sentenced him to life imprisonment in Azkaban. However, he later rescues his son as a favor to his dying wife. When they visit him in Azkaban, Mrs. Crouch used Polyjuice Potion to switch appearances with her son, enabling him to escape while she remains in his place. When she dies, she is buried under his identity. Crouch Jr. is nursed back to health by Winky, the family's house-elf.
To prevent him from returning to Voldemort's service, Crouch Sr. controls his son with the Imperius Curse and keeps him hidden under an invisibility cloak. When Bertha Jorkins discovers the truth, the news reaches Voldemort, who rescues Crouch Jr. and puts Crouch Sr. under the Imperius Curse. Crouch Jr. then imprisons Mad-Eye Moody, a famous auror, and using Polyjuice Potion, assumes Moody's appearance and position to infiltrate Hogwarts as the new Defense Against the Dark Arts teacher. Despite not being a real teacher, Crouch Jr. does a fair job and the class learns vast amounts from him, including valuable knowledge related to the three unforgivable curses. Crouch Sr. escapes and, exhausted and delirious from the Imperius Curse, reaches Hogwarts to tell Dumbledore about Voldemort's return; but his loyal Death-Eater son murders him on the castle grounds.
The revived Triwizard Tournament is held at Hogwarts, and Voldemort tasks Crouch Jr. with making sure Harry wins. To do so, he puts Harry's name in the Goblet of Fire, bewitches Viktor Krum to attack Cedric Diggory in the maze, and stuns Fleur Delacour. When Harry and Cedric simultaneously touch the Triwizard Cup, which is a portkey, it transports them to the graveyard in Little Hangleton, home of the Riddle family. There, after killing Cedric, Death Eater Peter Pettigrew uses Harry's blood in a ritual that re-embodies Voldemort. The Dark Lord attempts to kill Harry, but with the help of the ghost-echoes from Voldemort's wand, Harry escapes via the portkey.
When Harry reappears at Hogwarts, the still-disguised Crouch Jr. hopes to succeed where his master failed; but Dumbledore, Snape, and McGonagall foil his plot. Under the effects of Veritaserum, he recounts his plan to them. Although he is closely guarded so he can later repeat his testimony, a Dementor acting as bodyguard to Minister of Magic Cornelius Fudge attacks Crouch and sucks out his soul before anyone can stop it. Crouch lives bereft of his memories or sense of self.
To prevent him from returning to Voldemort's service, Crouch Sr. controls his son with the Imperius Curse and keeps him hidden under an invisibility cloak. When Bertha Jorkins discovers the truth, the news reaches Voldemort, who rescues Crouch Jr. and puts Crouch Sr. under the Imperius Curse. Crouch Jr. then imprisons Mad-Eye Moody, a famous auror, and using Polyjuice Potion, assumes Moody's appearance and position to infiltrate Hogwarts as the new Defense Against the Dark Arts teacher. Despite not being a real teacher, Crouch Jr. does a fair job and the class learns vast amounts from him, including valuable knowledge related to the three unforgivable curses. Crouch Sr. escapes and, exhausted and delirious from the Imperius Curse, reaches Hogwarts to tell Dumbledore about Voldemort's return; but his loyal Death-Eater son murders him on the castle grounds.
The revived Triwizard Tournament is held at Hogwarts, and Voldemort tasks Crouch Jr. with making sure Harry wins. To do so, he puts Harry's name in the Goblet of Fire, bewitches Viktor Krum to attack Cedric Diggory in the maze, and stuns Fleur Delacour. When Harry and Cedric simultaneously touch the Triwizard Cup, which is a portkey, it transports them to the graveyard in Little Hangleton, home of the Riddle family. There, after killing Cedric, Death Eater Peter Pettigrew uses Harry's blood in a ritual that re-embodies Voldemort. The Dark Lord attempts to kill Harry, but with the help of the ghost-echoes from Voldemort's wand, Harry escapes via the portkey.
When Harry reappears at Hogwarts, the still-disguised Crouch Jr. hopes to succeed where his master failed; but Dumbledore, Snape, and McGonagall foil his plot. Under the effects of Veritaserum, he recounts his plan to them. Although he is closely guarded so he can later repeat his testimony, a Dementor acting as bodyguard to Minister of Magic Cornelius Fudge attacks Crouch and sucks out his soul before anyone can stop it. Crouch lives bereft of his memories or sense of self.