The World’s Most Prolific Serial Killers Are Proof Monsters Walk Among UsBy Camila Villafane / October 12, 2017 Luis Garavito IMAGE BY: Pinterest Nicknamed “The Beast,” Colombian serial killer Garavito tortured, raped and murdered 147 boys before being caught. He was convicted of 139 killings, but Colombia law limits sentencing to only 30 years. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20