Jason had been driving around the city, pissed that he hadn't found much of anything. Cops were already at one address, so he thought it best to leave it to them.
Then he found the warehouse. The Commissioner's car was parked out front, a sign something interesting was probably happening. Jason wasn't the type to let someone have all the fun for themselves, so he crept around the building until he heard voices. He intended to scope out the situation before making any definitive moves.