Does it have a plate on it? And if so, NH or out of state? If NH, contact the dmv (you can email) with the plate number and ask them if they can contact the owner or have the owner’s town clerk’s office contact them. Best case scenario, it was a case of mistaken property (temp parking in what they thought was a friend’s yard), and owner can come and pick it up. Worst case, it’s abandoned and dmv can advise who to contact. I find it really odd that the determining factor for the police was that it was parked on private property. Sounds just plain lazy to me.

Despite the long wait times on hold, once you get through, the folks at the help desk are generally really nice and good to work with.