In this April 1, 2017, photo provided by Steve Duncan, retired law enforcement investigators, from left, Brad Berg, Javier Salaiz and Steve Duncan pose for a photograph in San Diego, Calif. Berg, from North Dakota, and the other two agents from California worked together on a drug conspiracy case that led to leaders in a violent Mexican cartel. The investigators are speaking about the case now that the file of an alleged cartel hit man has been made public. (Steve Duncan via AP)