CHICAGO — When Armando Flores’ powerful drug-trafficking brothers decided to flip on the Sinaloa Cartel and its notorious boss, Joaquin “El Chapo” Guzman, Flores knew he had to get out of Mexico. He had gotten married and put down roots there after being deported in 2003, his attorney said in court Wednesday. But it was a dangerous place for family members of cooperators. So he came back, with .