When Mexican authorities took Juarez drug cartel carnage king Jose Antonio Acosta Hernandez — better known as “El Diego” — into custody, he had weapons from Operation Fast and Furious on his person, the English-language transcript of the Spanish-language television network Univision’s special investigation into the scandal shows. “According to investigations, ‘El Diego’ forms the link between this massacre and Fast and Furious,” an anchor read on air in Spanish Sunday evening, referring to two different mass killings drug cartel operatives used Fast and Furious weapons to conduct as Univision reported. “When he [El Diego] was captured in Chihuahua in...