Luis Alfredo Garavito Cubillos (25 January 1957 – 12 October 2023), also known as La Bestia ("The Beast") or Tribilín ("Goofy"), was a Colombian serial killer, sex offender, pedophile, and necrophile. In October 1999, he confessed to committing the rape, torture, mutilation, and murder of 147 minors, predominantly young men and boys in western Colombia. Between his Colombian and Ecuadorian victims, he is confirmed to have murdered at least 193 minors in total, making him the most prolific serial killer in modern history.