Just like any other day, Dr. Jessica Sevilla Pedraza went to work at the hospital that morning, came home for a quick lunch and then left again. The plan was to see more patients, hit the gym and be back in time for her usual dinner with dad before he went to his night-shift job. Instead, a hospital co-worker showed up at the family’s door in the evening. She said a man had come in with a bullet wound in his leg and told doctors he had been with Sevilla when gunmen intercepted them, shot him and took off with...