During the briefing about 50,000 illegal immigrants crossing the border there's a citation on the wall titled: "Cheief" Commissioner's Commendation.
When the American police cars are hit by the drug running bus as it returns to the border, a police car is flipped, its bonnet ( hood) flies up - and there is clearly no engine.
On Robideaux's first day at the station, as all of the agent's are leaving their morning meeting, you can clearly see that one of the agents is wearing his belt too high.