How could he get a single shotgun wound to his chest if the shotgun is laying on the ground and he is in a chair? It does not make sense. I would think that there would be wounds to his legs instead or along with.
A weapons expert told the court that the safety catch, used to prevent the accidental firing of the gun, was faulty and it could have gone off without anyone touching the trigger.
I have a feeling she either a) shot him on purpose or b) with the faulty safety accidently pulled the trigger while dancing. I am leaning more towards A due to the story not adding up.
If she did shoot him on purpose, she's got one of the most creative false alibis I've ever heard of.