Guest wont leave

Hello! Hope everyone’s well! Fist post here & hopefully the last. I’ll try to make it short & quick, my s/o’s brother has had a rough past. He had no where to go & she invited him in to stay for a bit until he’s back on his feet. He’s becoming aggressive, yelling, etc. no physical violence as of yet, but has had that kind of past. He had a key, & has paid us for our trouble. He talked his way intoo staying longer unfortunately. We agreed on xyz amount for each month. He was drunk today & crossed lines. How do we go about removing him without getting into contact with our landlord- or are we screwed? The money hes given has never actually gone to rent if that matters. We both know we messed up but we tried giving him a second chance. Location: Oregon if that matters. Thank you guys so much!

Author: StraightAirline236