Nick's car is a ship of commerce carrying cargo on the high seas. Under the articles of Confederation and Admiralty law, the so-called judges of Minnesota have no jurisdiction over him. Nick should also arrest the judge.
There was a local sovereign citizen guy in Nick's area who used to report fake news about Nick (Terry Dean Nemmers). Nemmers was famous for (a) Making his own license plates, (b) getting caught with them (c) going into traffic court and trying to arrest the judge. He also sells an "arrest a judge" kit which Nick may now find useful.
I'm sure if he is not currently in the state hospital or on his meds, that the could offer lots of good legal advice to Nick.