Pedro Rodrigues Filho, a.k.a. "Killer Petey", was a prolific Brazilian serial killer, robber, vigilante, one-time mass murderer, and one-time cannibal. In most cases, Rodrigues targeted various kinds of criminals, finding them by looking up their names and addresses before brutally killing them in a variety of ways, though he stated that his favorite way to murder criminals was stabbing and/or hacking them to death with blades. He was usually spurred to act after hearing a crime was committed. In some instances, he would capture criminals (mostly career criminals and drug dealers) and torture them to death whenever he was motivated by anger instead of thrill. On occasion, he would change his M.O. by adopting the M.O. previously used.