He was in a mental hospital for a few weeks but then got discharged. It has helped somewhat as he is no longer shaking. He must have had some kind of mental breakdown or anxiety disorder and he is no longer deluded as he accepts Ian is not respobsible for Cindy dying in pison. He is not fully better but I don't think he is deranged. He's in an excitable/emotional condition yes but I don't believe he would hurt Stacey. I think this will be a bit like the gun scene. He said it wasn't for Ian and when Jane goaded hiom to say it was for him hev thought ghe might as well turn it on himself and it went off accidentally in the struggle. I think he did that perhaps because he was a bit desperate and didn't really know what he was doing. I don't believe he would ever become violent or hurt anyone intentionally ever - messed up or not. He just wouldn't. He probably got wound up when Stacey didn't take him seriously.