Is a U.S. Customs informant responsible for the death of two U.S. citizens? And was he allowed to get away with it because agents badly wanted to get his drug boss? According to dozens of pages of government documents, that is exactly what happened. ABC-7 uses exclusive information to outline a bloody drug tale in which murder plays a major role. El Paso Police will not yet confirm what ABC-7 has already uncovered. The cold-blooded killing outside the Whataburger at Paisano and Piedras, earlier this year, is directly related to a U.S. Customs informant working closely with the Vicente Carrlllo...