Note: Try this on the first mission for the best chance of success. When you first start out, do not get into Vincent's car but instead go directly to Portland Harbor and get the Uzi, which is located behind the portable construction office. Also, enable the weapons code to get a Mac 10, Uzi, or Tech 9. Find a roaming LCPD car and stop it before it gets to a light. Do this by blocking it with another car. Go to the passenger's side of the car and open the door, which will be locked. When the door unlocks, immediately enter the car and accelerate. As soon as the cop gets out, shoot him with the gun. If done fast enough, the cop cannot pull you out. Kill him and drive off in your stolen LCPD police car.