From a murderer that sliced up and cooked his victims to a killer that butchered 100s of woman in Peru, We count 20 of the worst serial killers ever. Click Here .\r<br>\r<br>SERIAL KILLER JOHN WAYNE GASY .THE KILLER CLOWN John Wayne Gacy, Jr. (March 17, 1942 – May 10, 1994), also known as the Killer Clown, was an .\r<br>\r<br>From crazy clown killers butchering small children, to the man who killed his own father and ate his heart, we count 15 of the most dangerous, psychopathic .\r<br>\r<br>SERIAL KILLER PEDRO ALONSO LOPEZ THE MONSTER OF THE ANDESPedro Alonso López (born October 8th, 1948[1] in Santa Isabel, Colombia) is a .
