Replying to So i just got a nuisance party citation...

and i need help. i wasnt in my dorm room, my roommates went either but there was a party going on. people got written up and m.i.ps that night but none of my rommates or i were present for it to be blamed on. the cops came back the next day and gave us a citation. it is the biggest one on the sheet, $1000. I was out with my girlfriend that whole night but didnt buy anything to prove my innocence like a receipt that i could show or something. i cant think of a way to prove that i was out except for people saying i was out like my girlfriend and the people i was with. is there any way i can reduce my ticket or anything i can do to get this shit to go away? o yeh and this is in a dormroom at farrand hall in boulder colorado. alright you future lawyers HELP ME OUT!