Parents Were aulted By Cops, What Would You Do Lawyers?

alright I am asking this because my mother and father were aulted by cops, they were doing a normal routine at night having dinner and about to sit down to dinner when someone started to bang on the door, well my mother got up and went to go check who was at the door and it was two police officers, they then started to ask were are the people were are the other people, my mother proceeded to let them in as the officers were just barging in and as she was doing that she was like umm what people? clueless to what these cops meant she stepped back and was allowing them to come in to speak to my farther, one of the cops then got in my fathers face saying WERE ARE YOU HIDING THE PEOPLE, hes like what are you talking about!? we are just about to watch tv. Then why that was going on the other cop and my mother went to the dinning room and she sat down on her own without being asked and was talking to him and as that was going on my father had his back turned to my mother talking to the other cop, then my mother went to stand up to grab a drink like diagonal from were she was sitting and then out of no where the cop that was standing there talking to her grabbed her wrists and started to grind them harshly and she started to pull back in pain and started to cry out for him to let her go and what the heck was he doing, my father then turned around in shock and was like to the other cop HAVE HIM LET HER GO PLEASE SHES NOT DOING ANYTHING. then the other cop was like to my father, just come outside and lets talk and hes like NO HAVE HIM LET HER GO! then out of no where that cop that was aulting my mother throws her wrists down and slams my father into the wall and starts to arrest him, my mother was screaming at them WTF ARE YOU HERE NO ONE CALLED THE COPS NOTHINGS GOING ON YOUR CAUSING ALL THESE ISSUES, then the cop that was arresting my father for no reason started to scream at her with these exact words SHUT THE F**** UP B**** OR I WILL ARREST YOU! my mother was so shocked shes like I AM CALLING THE COPS ON YOU THIS ISNT RIGHT! he then screamed back at the tops of his lungs GOOD F****** CALL THE COPS ON ME!! Then when they got my father in the car after arresting them my father said and saw the two cops screaming and fighting with each other and then the one who aulted both my parents peeled out of our driveway after having a fight with the other cop and then there excuse to why they arrested my father and why my mother got hurt because she was trying to stop them from an arrest they were making. WHAT ARREST IS THAT WHEN IT WASN'T EVEN THEM WHO CALLED OR HAD AN ISSUE!?! I mean the other cop was just talking to my father and there was nothing going on and then all this happened. what should my parents do?