Osiel Cárdenas Guillén, a prominent figure in Mexico's drug trade, has been released from a U.S. prison after serving a significant portion of his 25-year sentence. The former head of the Gulf cartel, Cárdenas Guillén was known for his ruthless tactics and the creation of the infamous Zetas gang, comprised of ex-special forces soldiers.
During his reign, the Zetas carried out brutal acts of violence, including the slaughter of migrants and innocent civilians. Cárdenas Guillén was sentenced in 2010 and extradited to the U.S. in 2007, where he was ordered to forfeit millions of dollars in illicit gains.
