Carlos Alberto "Beto" Rentería Mantilla (born March 11, 1945 in Tuluá, Valle del Cauca) is a former Colombian narcotrafficker and crime boss, presumed leader of the Norte del Valle Cartel.
Rentería is believed by the United States government to be holding a leadership position within the drug cartel, he has been labeled "one of Colombia's most powerful and sophisticated narcotics traffickers" by Adam Szubin, Director of the Office of Foreign Assets Control, United States Department of the Treasury.
The Attorney General of Colombia and the Colombian National Police accuse Rentería of narcotrafficking and money laundering.