then officer bach notices something. >> i see him kind of reach towards the gear shift. and just -- it happened so fast, i didn't even have time to tell him not to do it. he was sitting there begging about going to the bathroom, next thing i know he was taking off. >> the hyundai zooms ahead and pulls into traffic. officer bach gives chase. >> i think he was at that point willing to do anything to get away. because he knew he was probably going back to prison, which makes it even worse because he has nothing to lose. >> a police helicopter is deployed and a camera captures the scene from the air. >> the best about having a helicopter above is he can help clear the intersections, the helicopter can tell us traffic left or right, if we're clear, which allows it to be easier. >> the helicopter helps officer bach navigate the intersections, but anticipating the traffic on the ground presents him with another set of challenges.