<human>: (Ohio)
Long story, but last week my roommate an I were out at a party. He met this girl and they hit it off well. We all came back to our place, all of us were mildly intoxicated (were all of legal drinking age) but my roommate was especially drunk. My roommate and the girl start fooling around, but my roommate passes out before they go beyond making out. The girl still spends the night, and is gone the next morning when we wake up. Both of us remember everything from the night. A couple days go by and the university police show up to our room and bring my roommate in for questioning. Turns out the girl in question had a boyfriend and now she says my roommate raped her which is completely false. My roommate was turned over to the actual city police, I gave my statement and told what happened that night. Due to both of our accounts, and the girl having no evidence or witnesses to back up her false claims, no charges were filed. However, my roommate was expelled from the university (its a public university if that matters) after a judicial kangaroo court where he was denied any basic due process including having an attorney, producing evidence for his defense, and cross examining his accuser. What steps can he take to potentially sue the university, and the girl for libel if possible.

Can you provide a brief overview of the text?
<bot>: Roommate falsely accused of tape, city didn't file charges, but public  university still expelled him. What can he do?