Chris's trans status also complicates his defense regarding incompetency and sanity.
I believe Chris was taking hormone treatment, he just obviously didn't cut his dick and balls off. So, he was apparently mentally competent enough to make his own medical decisions. Also, he said he went for an STD check at a doctor. Maybe he didn't actually, BUT if he did that means he's aware enough to make doctor appointments.
If he can do these things, then you can't say he isn't capable of premeditated incestuous rape because muh autism.