CIUDAD VICTORIA, Mexico (AP) — A letter claiming to be from the Mexican drug cartel blamed for abducting four Americans and killing two of them condemned the violence and said the gang turned over to authorities its own members who were responsible. “We have decided to turn over those who were directly involved and responsible in the events, who at all times acted under their own decision-making and lack of discipline,” the letter reads, adding that those individuals had gone against the cartel’s rules, which include “respecting the life and well-being of the innocent. Days later, authorities arrested three suspects, but it turns out they had been kidnapped by a cartel, beaten into confessions implicating a rival group and turned over to police