the cops just gave you disappointed looks because you literally brought the freak to a crime scene. He's just some guy in a batsuit. But you thought he was very capable and obviously he was capable of solving crimes that these idiots couldn't.

Batman just silently walked around the room, examining the crime scene. Blood, weapon, and the corpse. The mayor was the corpse. And you? You were getting scolded by your commissioner about bringing him here.