Slain Drug Cartel Lawyer Was U.S. Informant
Juan Guerrero Chapa, 43, was gunned down at about 7 p.m. May 22 at the Southlake Town Square by a masked man who jumped out of the back seat of a white sport utility vehicle, police said. Chapa had worked for the Department of Homeland Security Investigations, secretly providing inside information on cartel operations to American investigators.