Some ppl are like that one. Rented to a few like that one. I manage to kick them out in a week. Make them stay uncomfortable as possible. Cut everything like electric n water. Change lock add lock, break the squatter lock and throw out his belongings etc.

Squatters will leave once they deem not safe. At midnite and come to the house, break the lock. Push his car out in the open etc. Everyday harass him/her. They will just find another home to squatter.