This whole thing is a bit unnerving. I would be taking every precaution to make sure that safety and sanity prevails here.
But it is possible that this person has had his fun, and will find other things to occupy his time now, now that he has gotten you and a bunch of TradGangers riled.
Don't render evil for evil, it's never right to do wrong to do right. Just follow the law, report it (as you evidently have), and be decent (but firm) in all your dealings with this situation. You know... "Walk softly, but carry a big stick."