Police don’t have the right to pull people over, ask them to exit their vehicle, cuff them, or put them in the back of a vehicle (detain them) without a reason. Stopping someone without reason is harassment, the rest is assault/battery (depending on location)/kidnapping without providing the reason. If they give you a reason they can detain you, but if that reason does not follow the laws or is determined to be unreasonable by a judge the body making the arrest is supposed to be held responsible and penalized, possibly making them open to a lawsuit. Aka she should sue them, and taxpayers should be pissed we are having to pay for this