Booth wasn't a cop no, but he didn't approve of Puck's behavior. Attempted bad boy attitude or whatever it was, it wasn't how he should have been acting for someone who had just been arrested. Seeley was about to advise him to keep his mouth shut when suddenly he decided he really didn't care. Puck thought Booth was his get out of jail free card. He was not. He couldn't just go around robbing people and breaking laws because Booth had more authority then the local police and assume after that he would love to break him out of the pokey. "Obviously." Booth grinned, but it was something more malicious and less genuine then real amusement, though Puck was probably too smashed to even notice.
"Sorry, But no. I'm here working a case. I have a job to do, Puck." Any trace of humor had left his face when the cop who was doing handling his processing walked away. Booth sat down on the edge of his desk and looked directly at Booth. The look on his face was a mix of disappointment and betrayal. If looks could kill, Puck would be ten feet under. His gaze leveled on the boy coldly. "Enjoy your stay, kid." By doing what Puck had done, he'd not only gotten himself screwed but lost any respect Booth had for him. "Sleep tight." Seeley got up to leave when the processing officer rejoined them, and Booth whispered something to him about isolation. With a little wave to the drunk boy cuffed to the officers desk, he was on his way.