Passage: Recovering at the X-Mansion, Wilson reluctantly agrees to join the X-Men because he believes Vanessa would have wanted him to. He, Colossus, and Negasonic Teenage Warhead respond to a standoff between authorities and the unstable young mutant Russell Collins / Firefist at an orphanage, labeled a "Mutant Reeducation Center". Wilson realizes that Collins has been abused by the orphanage staff, and kills one of the staff members. Colossus stops him from killing anyone else, and both Wilson and Collins are arrested. Restrained with collars that suppress their powers, they are taken to the Ice Box, an isolated prison for mutant criminals. Meanwhile, Cable—a cybernetic soldier from the future whose family is murdered by an older Collins—travels back in time to kill Collins before he ever becomes a killer.

Question: What kind of prisoner are Wilson and Collins?
mutant