Raúl Meza Ontiveros (American Spanish: [ra'ul 'mesa onti'ße?os]; 11 December 1966 – 27 March 2007), commonly referred to by his alias "El M6", was a Mexican suspected drug lord and high-ranking leader of the Sinaloa Cartel, a criminal group based in Sinaloa.
He was the right-hand man of Javier Torres Félix (alias "El JT"), the former leading operator of Ismael "El Mayo" Zambada, one of Mexico's most-wanted drug lords.
In 1997, he was arrested with several of his accomplices in Cancún in possession of 348 kilograms (767 lb) of Colombian cocaine.
He was sentenced to ten years in prison, but was released in 1998 for inconsistencies in the case.
Investigators suspected that he rejoined organized crime after his release and climbed up the leadership chain of the Sinaloa Cartel.
Upon the arrest of El JT in 2004, Meza Ontiveros worked closely with Manuel Torres Félix (alias "El M-1") and Misael Torres Urrea (alias "El M-2").
In 2007, he was killed by armed men in Culiacán, Sinaloa.
The official details regarding his death are unknown.
In the following years, his family suffered several loses.
In 2009, his sibling Faustino was killed by suspected organized crime members.
His son César Raúl Meza Torres (alias "El Mini-6"), who tried to follow Meza Ontiveros' footsteps, joined the Sinaloa Cartel as a young assassin.