Marc Vincent Sappington (born February 9, 1978) is an American spree killer and cannibal convicted of murdering four acquaintances in March and April 2001 in Kansas City, Kansas. He gained notoriety for eating part of the leg of one of his victims, Alton "Fred" Brown. Lawyers for Sappington blamed the four-day killing spree on a history of schizophrenia and daily use of the hallucinogenic drug PCP. Sappington himself claimed that voices in his head told him to eat flesh and blood or he would die.