One of the Sinaloa cartel leaders who launched a struggle for control of the gang following the re-arrest of Joaquin "El Chapo" Guzman was captured Tuesday ... Damaso Lopez, known by the nickname "El Licenciado" — a title for college graduates. Lopez was long considered Guzman's right-hand man and helped him escape from a Mexican prison in 2001. Lopez, 51, is believed to have been locked in a dispute with Guzman's sons for control of the cartel's territories. The head of Mexico's federal detectives' agency, Omar Garcia Harfuch, said Lopez was "one of the main instigators of violence in Sinaloa...