I was under the impression that there was one empty shell in the chamber because gun hadn’t been cycled yet. 3 other unspent rounds still loaded in the rifle. I think that’s what the Utah DA said. Not discrediting your opinion, just wondering where you heard/ saw 4 empty shells.

This is one of my all time favorite movies! Glad to see you enjoyed it. I also really liked Alien: Covenant, I think it’s a bit of a sequel if I’m not mistaken, fun to watch them in succession.