My Roommate Keyed My Car

My 23 M roomate is a big partier which doesn’t always align with my 23F and 23bf schedules since we prefer to work in the AM and be off around 5. Every Thursday this housemate has 2-4 people come home with him from the bars at 2am and starts to create an after party here at the apartment. Wasn’t too much of an issue untill Last Thursday when the three under legal drinking age girls were in the kitchen screaming and jumping with no roommate in sight. I went out of the room and politely asked them to be quiet when they didn’t know where my housemate was so i could address him first. 30 minutes go by and the screaming jumping and music still goes by and i walk out to find them eating my food. Understandably upset i asked him to begin to take the party elsewhere. He started yelling at me calling me names and my boyfriend asked him to leave and he ended up leaving finally after yelling at me. This Thursday he stated he wouldn’t bring anyone back after being so sorry for last weekend and assuring that no one would be over, i stayed in town due to work and my boyfriend went on a trip. I woke at 1:30 to my housemate bringing 4 people over, they began laughing, being loud and playing music. Because i was without my boyfriend i was nervous to approach him to be quiet and let it continue for an extra 30 before the bass of the music was too much. I approached nicely and asked if the party could be moved elsewhere. He straight up said no and started connecting a massive speaker and a Dj table and insisted that they “must turn up now” and i was shocked and then it all escalated. My boyfriend called him from out of town to try and deescalate and he refused to listen. Him and his friends eventually left but before he said he was going to key my car and i was very scared i watched them from my window stand my by car, my boyfriend told me to go down there but i was too nervous considering how tense it all was. Wrong idea. Came out to my car keyed. The cops came to take a report when he came back and it’s being sent to the DA. How do i get him charged for this without video proof?