My Motorcycle Got Tipped Over At A Party

I was at a party on halloween and things were going well. Until a guy approached me drunk asking about if I had seen his bag. One thing lead to another and the guy ended up flipping tables, punching a girl and tipping my bike over. The damages to my bike are about $1500 with labor(i got this amount from a certified yamaha mechanic). I reached out to him trying to rectify this on a personal level since he already has a record. He apologized and said he would pay me $100 a week. Nothing ever came. I now want to pursue things legally and don't know what the best action is. Should I go to the courthouse or the police department? Just in general what should I do and who should I talk to?