Ismael Zambada has been featured on America's Most Wanted, and the FBI is offering up to US$5 million for information leading to his capture.
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He is a Mexican suspected drug lord and leader of the Sinaloa Cartel, an international crime syndicate based in Sinaloa, Mexico.
El Mayo who is estimated to be worth $2 billion began his career as a farmer, but according to multiple reports, started dealing drugs at around 16 years old - eventually becoming linked to the Guadalajara Cartel.
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He worked with Amado Carrillo Fuentes in the 1990s and, alongside Joaquín "El Chapo" Guzmán, helped the Sinaloa Cartel absorb many of its factions when Fuentes died in 1997.
He is still alive today and is believed to be 72 years old and has seven children.
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Guzman, World's Most Wanted subject Ismael "El Mayo" Zambada García has never been captured. The notorious Mexican drug lord, who's credited with building the Sinaloa Cartel with El Chapo in the early '90s, has managed to evade authorities for years. Where El Mayo is now remains unknown, but he's believed to be hiding out in Mexico's Sinaloa mountain.
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Notorious El Chapo and El Mayo are thought to have built it up after the Guadalajara cartel broke up, and its chilling reputation for violence has only grown since.
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