Later the next day, one of Mary's tennis students goes into the locker room after the killer plays music on the loudspeakers and ends up being sawed in half. While Mary and Kendall focus on turning off the music, the killer steals the girl's legs and escapes. Kendall presents his theory to Holden about the killer being a member of the faculty, since he knows when and where to strike before avoiding the police. They spend hours researching files on the faculty and discover that the dean previously changed his name and that his mother was brutally murdered, discovering that he was Timmy. Meanwhile, Mary is drugged by the dean at his apartment and attempts to saw off her feet, since the previous victim's feet did not fit his mother's shoes for the puzzle. Bracken, Holden, and Kendall burst into the dean's apartment, and he is shot dead by Bracken while Kendall rescues Mary.