Is it true that you shouted at Professor Umbridge?" "Yes." "You called her a liar?" "Yes." "You told her He Who Must Not Be Named is back?" "Yes." "Have a biscuit, Potter.
J. K. RowlingSeverus, please fetch me the strongest truth potion you posess, then go down to the kitchen and bring up the house elf called Winky. Minerva, kindly go down to Hagrids house where you will find a large black dog sitting in the pumpkin patch. Take the dog up to my office, tell him I will be with him shortly, then come back here.
J. K. Rowling