Renter left after eviction notice served....cousin still there.

[Cynthia Malmquist]

I know the rules vary from state to state but I am hoping someone from Michigan (mainly Genesee County) may have some advice. My renter in the City of Flint has moved all of her stuff out because we are in the process of an eviction (court date is Jan 8th) However, a cousin that has been staying there on an off (according to her) now refuses to leave and is being belligerent and threatening. Do I have the right to call the Sheriff regarding the trespasser or do I just follow through with my court date and deal with it at that point? Any advice would be greatly appreaciated!