Al Jazeera's reports from Mexico indicate, that the man nicknamed El Diego is a former police officer.Whom then became the head leader from the cartel La Linea, Who operate as a gang of hitmen and who force corruption on police, The Linea are enforcers for the Juarez cartel. originally set up by a number of former and active-duty policemen, heavily armed and extensively trained in urban warfare.

Their corrupt "line" of policemen were set up to protect drug traffickers, but after the forming an alliance with Barrio Azteca to fight off the forces of the Sinaloa Cartel in 2008, they established a foothold in Ciudad Juárez as the enforcement wing of the Juárez cartel.[2][3] La Línea has also been involved in extortions and kidnappings.[4]