Succession struggles and a wave of internal violence: What the arrest of 'El Nini' means for Mexico's Sinaloa Cartel | International
Néstor Isidro Pérez Salas was the head of security for Los Chapitos, the branch of the organization led by the sons of El Chapo, and suspected of orchestrating the violence unleashed in response to the detention of Ovidio Guzmán
Source: elpais.com