The U.S. Bureau of Prisons (BOP) says the release date of Osiel Cárdenas Guillén, former leader of the Gulf Cartel, is unknown, after his release was expected this Friday.
In a search of his records, the agency shows that he was a founder of Los Zetas and was serving a 25-year sentence in the US. He is currently in the Terre Haute penitentiary in Indiana.
However, the release date is reported to be unknown.