Cool story. Hope it works out for you.
Why would the deer be kicking and biting at the stump? The only time I’ve heard of this if some type of illegal attractant is present.
Not thinking that you did it, but perhaps one of those people on your camera (I’ve found “stuff” in torn up stumps on a property that I used to hunt and I know I didn’t put it there, but someone else did).
And by the letter of the law, not knowing is not a get out of fine card.