Inquisitorial Squad is a fictional group from the Harry Potter Universe
Dolores Umbridge was called High Inquisitor, hence the name behind the group she set up.
This was a group of students picked out by Dolores Umbridge while she was Headmaster of Hogwarts. The job of this group was catch anyone doing anything wrong, as they was all Slytherins they used their powers to take away House Points rather than find wrongdoers. The squad was ment to help repress actitivity of those students who disagreed with the Ministry's claim of Voldemort not having returned. This meant the main opponents was Dumbledore's Army. This group had powers higher than prefects as they was able to dock points from other prefects. When Fred and George Weasley left they made sure they hex'd multiple members of the group. The group caught Harry, Hermione, Ron, Neville, Ginny, and Luna attemtion to use the Floo Network to travel to the Ministry. After Lord Voldemort's return was seen by the Minister, Umbridge lost her position, and the Inquisitorial Squad was disbanded. They appeared only in Harry Potter and the Order of the Phoenix.