In the study with the wrench

After their headmaster is brutally murdered, the students of Blackbrook Academy are thrown into chaos, half of them not returning to campus. The ones who have--including Orchid McKee, Scarlett Mistry, Vaughn Green, Phineas Plum, Beth "Peacock" Picach, and Sam "Mustard" Maestor--have been titled the Murder Crew by the other students. Then, another staff member shows up dead, and everything comes to a boiling head at Tudor House.