Butch "The Butcher" Mahan is a character in the novel Friday the 13th: The Jason Strain.
A champion ultimate cage fighter, Butch, after being framed for a double homicide, is put on death row and disowned by his mentor and adoptive father. While in prison, Butch is approached by media mogul Caleb Carson, who convinces him to compete as one of twelve contestants on his death sport reality show Extreme Elimination 2, promising Butch that if he wins the game Caleb will help him prove he was innocent of the murders he was imprisoned for. While on the Costa Rican island where Extreme Elimination 2 is set, Butch befriends fellow contestants Alexandra Coyle and Valkyrie Randall and together, the trio escape the island with a group of soldiers after a zombie plague spread by Jason Voorhees, a "special guest" on Extreme Elimination 2 who, after being exposed to an artificial virus, begins to emit a reanimating plague that causes his victims to come back as the undead. After Valkyrie and the soldiers are killed either by zombies or Jason, who had reached mainland, Butch and Alex reach the compound of the soldiers' boss, Dr. Helen Cain, the person who accidentally created the "Jason Strain" virus while trying to artificially recreate Jason's apparent immortality.
Using holographic technology developed by Dr. Cain, Butch and Alex manage to capture Jason by making him believe Alex is Pamela Voorhees and take him to Dr. Cain's compound, where a cure for the Jason Strain (which will not affect Jason, but will kill the infected and immunize the living) is being released into the air. Upon reaching the compound, Butch and Alex find Dr. Cain dying, having been shot repeatedly by soldiers working for Caleb Carson, who still believes he can salvage what is left of Extreme Elimination 2. Before being captured by Caleb's soldiers, Butch manages to obtain the dosage of the Jason Strain cure meant to rid Jason of his plague spreading abilities from Dr. Cain. Put on a plane set for America, Butch, after Jason breaks free of his restraints and begins to kill everyone on the plane, learns from Caleb that he was the one who actually ordered the double homicide Butch was imprisoned for, believing that his actions made Butch 'interesting'. Giving Alex a recording of Caleb's confession, Butch has her jump out of the plane with a parachute while he stabs Jason in the eye with the syringe containing the cure for the Jason Strain before the plane crashes, removing Jason's ability to reanimate his victims. With Butch dead, Alex honors his last request, giving the tape containing Caleb's confession to Butch's adoptive father.