It sure is a big liability if something should happen later though, don't you think? Even if kids got to him that shouldn't have , some jury may still say but you knew he had killed someone . Oh well....I guess that's what insurance is for.
No, it's what the term "assumed risk" is for. If he was really that bad of a biter I wouldn't give him access to the aisle. Anyone on a horse property is assuming a presumed risk, and the death that happened was an assumed risk of jumping.
He didn't 'kill' someone. He refused a jump and tumbled over it because he couldn't get himself stopped in time. That's an accident. He didn't seek the guy out and stomp him to death.
I'm surprised at you both. 