The second task involves the champions diving underwater to rescue someone valuable to them. Harry finishes third, but is promoted to second behind Cedric due to his "moral fibre", after saving Fleur's sister Gabrielle as well as Ron. Afterwards, Harry discovers the corpse of Crouch Sr. in the forest. While waiting for Dumbledore in his office, Harry discovers a Pensieve, which holds Dumbledore's memories. Harry witnesses a trial in which Durmstrang headmaster and former Death Eater Igor Karkaroff confesses to the Ministry of Magic names of other Death Eaters after Voldemort's defeat. When he names Severus Snape, Dumbledore vouches for Snape's innocence; Snape turned spy against Voldemort before the latter's downfall. After Karkaroff names Barty Crouch Jr., a devastated Crouch Sr. imprisons his son in Azkaban. Exiting the Pensieve, Harry realizes that Crouch Jr. is the man he saw in his dream.