Little background information: He's 16 and just got his license. His name is Kyle.
He's been acting completely out of line. He gets home a few weeks ago at 2 in the morning. My dad wakes up and goes to yell at him for being home so late. So my dad does that and Kyle just acts like a complete butch the entire time. He was rolling his eyes at him, saying "OK WHATEVER" in a typical teenage girl tone, and then started calling my dad an "ugly fat peice of shit" and other things. So my dad goes to grab him and Kyle goes fucking apeshit. He fucking punches my dad and pushes him into the miror behind him shattering it. My dad finally has enough and tries to kick him out of the house. But my mom is there at this point and she vetos his decision (They are in the middle of a divorce and pretty much hate each other. Resulting in a lack of empathy for my dad).
Kyle acts like this for the next couple of weeks. He and my dad get into a few scuffles every few days, but my mom refuses to intervene.
So one day after they're done arguing, I confront Kyle. I basically told him that he's being a disrespectful shithead and that he needs to stop. He then threatens to post some embarrassing shit about me on the Internet (lol I sound like a middle school girl) Then he goes apeshit on me and starts throwing punches. I retaliate, and get one in his gut, one on his jaw. Then he just gets more angry and gets a fucking baseball bat. At this point I was just trying to survive, but I was also fucking cause he hit me with the bat. I managed to wrestle him to the floor. Then I was simply seeing red. I just let loose. My mom came home right as this was happening and ripped me off.
My mom takes him to the hospital. He has a mild concussion, a broken nose, and an orbital fracture. Cops come by. They ask a few questions then leave.
So my brother comes home and tells me that he is going to get my mom to file a restraining order against me. (No idea if he can do this or not). He also said if I ever touch him again, he will press charges (I'm 18).
So NS, what should I do about Kyle