If she can even prove he is the one who shot her.
For all anyone, including a jury knows, even if he brought the gun to the scene, prove RG didn’t jump him and the gun went off. Prove RG didn’t grab the gun, and wasn’t swinging it to his MB in the face with hit and it went off. The jury is going to be writing down all the different ways this happened and passing them around, asking, could it have been like this?