Pedro Oliviero Guerrero Castillo (a.k.a. Cuchillo/The Knife) – December 24, 2010) was a Colombian drug lord and the former leader of the Colombian Popular Revolutionary Antiterrorist Army (Spanish: Ejército Revolucionario Popular Anti-terrorista de Colombia (ERPAC) ), a drug trafficking, right wing paramilitary organization. His nickname came from the favoured weapon he used on his victims.
In December 2010, ERPAC paramilitary leader Pedro Guerrero, also known as Cuchillo or "Knife", died after a police raid.