If you feel threatened in the situation you are in, you can petition for an "order of protection". The local police told me that this was the only way to get an agressive roommate out by the next day without eviction.
I had two roommates temporarily living with me on a week to week lease. At the end of the second week, they still had not paid any rent and had broken our verbal agreement numerous ways . I gave them a week notice and in relatiation they stole $3000 worth of electronics from my household (but...