The little bit I know about this comes from a friend who spotted for the founder of Kuiu on his sheep hunt. Beside the huge amount he spent on the tag, he had several spotters on the ground and in a helicopter but he came out successful with his record sheep.
Evidently he had to do it because he was a thrill seeker and that was all that was left for him. It probably cost $500,000 or so.
He took his life fairly soon after. Evidently he was suffering with CTE and with no bigger thrills available, he checked out. That's my theory any way, if my friend on the hunt had his own theory, he kept it to himself. He had nothing but good things to say about him so it's very sad to know that CTE can have that much impact on a person who outwardly seems to have everything and everything to live for.
Also, if a sheep hunt can make a guy hurting that bad hang on for that long, it must be one hell of an experience.