Seems quite likely he'll be found not guilty for self defense reasons. Based on existing laws and rules that makes sense.
There is the question on self defense laws themselves and how they apply in situations like this. Basically he's out there armed and taking the law into his own hand. The thing he's supposedly protecting has no link to him. If he's not armed to the hilt does any of this happen?
https://www.nytimes.com/2021/11/13/u...e=articleShare