Shortly thereafter, Voldemort and Peter Pettigrew show up at the Crouch family home, having found out about Crouch Jr. from interrogating Jorkins. Voldemort places Crouch Sr. under the Imperius Curse, freeing Crouch Jr from the Imperius Curse placed on him by his father, and forces Crouch to continue to appear in public as if there is nothing wrong. While still under the Imperius Curse, Crouch Sr. acts as one of the five judges at the Triwizard Tournament. However, worried that Crouch will fight off the effects of the Imperius Curse, Voldemort later has him imprisoned within his own house and has him communicate exclusively through supervised owl post. Despite this precaution, Crouch manages to break free of the Imperius Curse, and makes his way to Hogwarts, hoping to warn Dumbledore of what is happening, running into Harry and Viktor Krum in the Forbidden Forest. However, while Harry is on his way to summon Dumbledore, he unwittingly alerts Crouch Jr., who is using Polyjuice Potion to impersonate Mad-Eye Moody, to his father's presence. Crouch Jr. immediately goes to the forest, stuns Krum, kills his own father, transfigures the body into a bone, and buries it on the Hogwarts grounds.