In the scenario Detective Sanchez had several option on how to handle the intel he discovered while at the Georgia information sharing and analysis center (GISAC). Even thought Tepes was wanted for the killing of a police officer, it was a sensual that detective Sanchez notify the agent in charge (AIC). By doing that he was able to discover that Tepes was under surveillance for suspicion of being associated with a terrorist cell. The capture of Tepes was inevitable and stopping a terrorist attack took precedent unfortunately over a suspected Atlantic police officer. As you alluded to detective Sanchez loyalty maybe with ADP and the capture of a police killer, but the disruption of a terrorist cell is the goal.
