A lady spends a life harassing others, being a PITA, threatening their livelihood - not only in her area of horses, but calling CPS and ICE as well, being a drama monger… and then there are consequences.
Not that he should have shot her. Just that she isn’t lily white, either.
Me? I’d have someone go rip the weatherhead off the house, and maybe remove a door or two and a few windows, with a sign by the street that says “free stuff in house, please remove”.
(Remove the doors in the middle of winter is how a friend got a squatting tenant out. She was waving it in his face that he would not be able to evict her for months at the earliest, after a month and a half of non-payment already. Front and back doors were removed within 24 hours. Tenant was gone 6 hours after that. Legal? No. But a notably more peaceful solution to a landlord dispute.)
For the horses? I’d leave a 30 day notice, and on the second that the 30 days are up I’d throw all of her equipment, supplements, everything… in the ditch out front. Horses would have liens put on them immediately. Security at front gate to not allow them on the property without sheriff present.
Don’t want to serve the crazy lady with an eviction notice if she’s paying the rent? Jack the rent up to something obnoxious, then you can kick her out for non-payment.
EDIT: Can you legally put a sign in a yard, a big one, that says “TENANT HAS NOT PAID RENT IN XX DAYS”? That would be a great, humiliating way to encourage squatters to GTFO