Unless their "orders" were unlawful... police can't just conjure whatever "orders" they feel like... the orders must be lawful. You do realize that they need a warrant for search and seizure, right?... unless they have probable cause that the vehicle itself was a crime scene... aka bullet holes in the door or glass. 

Beyond that, she gave them the keys... likely by dropping them on the ground disrespectfully. Does that justify a violent assault by 3 men on 1 unarmed woman? What country do you think we are living in, USSR?