A former top lieutenant to accused Mexican drug lord Joaquin “El Chapo” Guzman on Tuesday said he and his former boss once discussed killing a police officer as a favor to a local politician. Guzman, Nunez said, responded that they should do the mayor the “favor,” because she was a favorite for a state-level office in an upcoming election. The mayor of La Paz in 2013 was Esthela Ponce Beltran, who could not immediately be reached for comment.