Mexican officials have confirmed the arrest of a suspected powerful gang leader.<br /><br />Police say Jose Antonio Acosta confessed to ordering the killing of around 1500 people. <br /><br />As Al Jazeera's Franc Contreras reports from Mexico city, the man nicknamed 'El Diego," is a former police officer who became the head of La Linea, a gang of hitmen and corrupt police officers who act as enforcers for the Juarez Cartel.<br /><br /> has more