Luis Alberto Guerrero Reyes (died 10 May 2004) was a Mexican suspected drug lord and high-ranking member of Los Zetas, a criminal group based in Tamaulipas, Mexico. He joined the Mexican Army in 1987, specializing in explosives, martial arts and grenade launchers. In 1999, he deserted the military and joined the Gulf Cartel under kingpin Osiel Cárdenas Guillén, becoming one of the first members of its newly formed paramilitary wing, Los Zetas. Like Guerrero Reyes, most of the first members of Los Zetas were ex-military. Los Zetas was responsible for providing security services to Cárdenas Guillén and carrying out executions on the cartel's behalf.