Damn right, they're guilty! Serves the bastards right.
And don't get me wrong, here. I'm not only gleeful that justice got served to a bunch of lobbyist assholes. I despise poaching. Considering that it's the same as willful destruction of a federal resource (property) I think that poaching sentences should be vastly more severe than they are.
And what really sticks in my craw is when poaching is done not for food, or even profit, but rather when sub-humans do it because they feel privileged, better than the rest of us. Killing for fun should be severely punished, and these dick-drips got off lucky.