This doesn't make any sense. Obviously this person was a trained killer. I think the whole rifle in the woods thing is a prop. It's kind of like the passport they found untouched after nine eleven. I believe it's a distraction to make us think along the line they wanted, or to make us look in the wrong place. A kind of smoke and mirrors or a slight of hand.
It's almost like somebody's making war against us, by deception.
The question that always comes to mind though when i hear stuff like this is: In a case where someone DID actually act alone, wouldn't people STILL be saying "they didn't act alone?" It just seems like you can't come to those sorts of conclusions at this stage and the historical distrust of media and govt is going to skew people's minds in that direction even if they DID factually act alone.