Could Misty and Tommy being trying to force JO into telling what happened? What if Ron and JO are the ones who know what happened, TN would know that, hence her not wanting to cast suspicion on JO. What if the fight over the gun, where ever it was, wounded up with Haleigh being shot. It freaked em both out and hence the madness. Maybe Misty and Tommy only know bits and pieces. Or maybe I have finally gone off the deep end...lol.
I've taken the plunge with you, but I do agree that could be what happened...JMO