Former Mexican drug cartel leader who generated 'new era' of organized crime is released from US prison

Osiel Cárdenas Guillén, a former drug cartel leader described as having "generated a new era of organized crime" in Mexico, has now been released from U.S. prison and may be heading back over the border, reports say. 

Cárdenas Guillén, the past leader of the Gulf cartel who created the Zetas — a gang of former Mexican special forces soldiers who became his private army and hit squad — was transferred into the custody of U.S. Immigration and Customs Enforcement on Friday at a federal prison in Terre Haute...