It was aliens.

They set the whole thing up.
They had a cloaked blind and were using phased shotguns.
They was tired of both parties wearing out the ducks on both sides of em and not getting shots.
They did a mind scrambler on crabtree which was easier than normal.
Took the old man's body back to the underwater base beneath reelfoot lake for alien lizard dog pet food.

This whole thing will be a really good episode on unsolved mysteries in 5 or 6 yrs.