I wonder if this trial might go the way of the Stauch one. Not Guilty by Reason of Insanity defense. If his confessions are solid, the defense may have no other legal recourse than to try for NGRI. That he suffered psychosis and didn't know what he was doing. Suddenly thought he was in Nam. Or his other identities did it. It won't fly because of his behaviors before and after, especially if the Prosecution can establish an online link, via catfishing and CSAM but the defense may be forced to concede he did it, he just wasn't in his right mind when he did.
Varies by state, I think, but I wonder if the defense would have to prove insanity to a jury or if the prosecution has to prove sanity...
Either way, I hope he is kept safe from himself, conditions and others so he's alive and healthy to face a full jury of his peers.
Jmo