I am in Indiana. Commercial landlord tenant can a landlord change locks and threaten arrest with no notice.

I am in Indiana, I was behind on my lease payments on my commercial building. Without any type of notice my landlord changed the locks and got his "friend" the local police chief to threaten arrest if I entered the building. It was over 2 months before I received any of my things back, then I only got partial. Is this legal, does anyone know of any cases to compare to for a local attorney, what kind of attorney would I look for? Thanks.