Soooo, then it actually was Kelsey that tried to shoot her, but Tory attempted to wrestle the gun out of her hand when it went off?If she shot herself then she'd have gunshot residue on her hands or prints on the gun. Only Kelsey and Tory had DNA on that gun. It was Tory's gun in the first place so how did it even come into play unless he pulled it out?
I have two theories.
First is that Kelsey tried taking the gun from Tory because she was getting her ass whooped and it went off. Second is that Tory drunkenly fired the gun at the ground to break up the fight and grazed Megan's foot.
Megan told the police that her back was turned so she didn't see who shot the gun, Tory also said on daystar that she had her back turned and implied that she doesn't understand what actually happened.
That's the only way I can see it because there's no reason for Tory to shoot her.