Cardinal Juan Jesus Posadas Ocampo and six other persons were accidentally killed when gunmen hired by a Tijuana drug cartel mistakenly opened fire on the cardinal's limousine. Law enforcement officials say that members of the Calle Treinta gang were hired by the Arellano brothers to kill a rival drug lord, Joaquin Chapo Guzman. Guzman was believed to be the target when Cardinal Posadas was shot last May 24th. For Latino USA, I'm Marie Araña in San Diego.