The Headmaster was in charge of the Essex House for Mutant Rehabilitation. On the surface, he was dedicated to helping troubled young mutants. In secret, however, he headed a torture facility, experimenting on young mutants, with banners proclaiming "Humankind not Mutantkind." Eventually, one of his victims, Russell Collins, got out and went on a brief rampage outside the school. This was interrupted by the X-Men with Deadpool, which soon went south when Deadpool executed one of his assistants for their role in the torture.