Adán Javier Medrano Rodríguez (24 December 1969 - 8 February 2018), also known as El Licenciado (The Attorney), was a Mexican convicted drug lord and former high-ranking member of the Gulf Cartel, a criminal group based in Tamaulipas, Mexico. He joined the cartel during the 1990s, and was a trusted enforcer of former kingpin Osiel Cárdenas Guillén. His roles in the cartel were managing drug shipments from Guatemala to Mexico, supervising murders ordered by Cárdenas, and coordinating cash transfers from the U.S. to Mexico.