Continuity mistake: When Darby is running from the police and heading for the police car you can see the exhaust emitting from the police cruiser tail pipe. When he gets in the car he says start the car and you can see Clyde turn the ignition/keys and the engine starts of an already idling vehicle. (00:20:35)
Continuity mistake: In the scene where Nick is flown by helicopter to find Mr Reynolds, the helicopter changes registration from N94PD in flight to N95PD when they land.
Answer: Because Nick knows this man is guilty. He says it to almost imply, "well since I'm getting off, may as well make a visit to your family next. You married, Nick?"