Question: jigsaw who is the killer?
Answer: John Kramer (colloquial: "The Jigsaw Killer") is a fictional character and the main antagonist of the Saw franchise. Jigsaw made his debut in the first film of the series, Saw, and he later appeared in Saw II, Saw III, Saw IV, Saw V, Saw VI, Saw 3D, and Jigsaw. He is portrayed by American actor Tobin Bell.