This achievement is unlocked during mission #8 of 26 in the game (4th of 5 in the TRAFFIC desk). The case is "Slip of the Tongue" and early in it you find yourself having to chase the suspect as he tries to make the run for it upon your arrival.
You have to hurry and ram his rear wheel from the side so that his car is stopped BEFORE uniformed officers arrive to the scene and stop him for you. This is not hard to do, I usually tend to ram them from the left side and usually 2 or 3 hits do the trick.
Found this video in YouTube with all credit going for
Rooster Teeth who has most achivement in this game covered with video material.
Hope this helps!