Imperius Curse

Dolohov - Notable Death Eaters - Barty Crouch, Jr
... him from returning to Voldemort's service, Crouch Sr controls his son with the Imperius Curse and keeps him hidden under an invisibility cloak ... the truth, the news reaches Voldemort, who rescues Crouch Jr and puts Crouch Sr under the Imperius Curse ... 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 grounds ...

Ludovic Bagman - Ministry Officials - Pius Thicknesse
... of the book, when he is placed under the Imperius Curse by Yaxley, who uses his position to infiltrate the senior ranks of the Ministry ... Following the end of the battle, the Imperius Curse that was placed upon him is broken ... Scrimgeour's death there is no mention of the Imperius Curse being used to secure his support ...