No, i don't think there will be a hung jury.
I do think they will find JH guilty but I think he will get LWOP.
I do not think they will give him DP...just because of the mental issue.
I think he deserves it however as he knew what he was doing. He planned this way to long, to clever, or so he thought, in getting the ammo, weapons, armor, where he would commit the crime, time, people involved, his apartment. He will be found guilty for sure on that. The DP, I just don't think they will give it to him. However, that being said, life in prison might be worse for him. As for the victims. I am sorry they will not get what they want. Their lives are forever changed and nothing can change that.