I'm not sure about politics and the relative merits of accident vs. no accident theories. And I hate to be stereotyping.
My perpsective was more about human nature:
200 feet from the road? Let me propose a gun-toter who pulled off by the road for a pee, dropped trow in semi-darkness, and thought he was about to get attacked by an animal, so he shot at where the sound was coming from (the unfortunate wildlife biologist), not being able to see clearly 'n all. The sound was coming from head height, so it must be a really BIG animal.
Thankfully, no animal attack ensued, so he hauled up trow, jumped back into his vehicle, and with a squeal of tires, got the heck out of there. Shaking all over: animals in the dark, attacking animals, big animals, wild animals, mountain lions coyotes, bears, animals way over my head, anything that makes a rustling noise when he can't tell what it is, scare the heck out of him. Whew!
I'll bet the wildlife biologist's hammock was black, dark brown, or dark green. He wriggled and sighed.