well like i seen before, if you lose sight of the suspect and he is off your normal radar (not when you zoom out when you press down on the controller). So after like so long it could say that the suspect has found and removed the tracker. Then he disappears off of your radar and then after so long you end the chase like normal. but yes i see how it can be a little hard to script, and also the car would need the box on the grill to make it look legit. Hey its thought!