Pressed post too soon.
I was saying that I would imagine OP's disability would impact his response to danger.
I think this is more about disability and its impact fight or flight, then necessarily about anxiety.
A lot of law concerns examining what the "reasonable man" would do. I think in UK law, this was nicknamed "the man on the Clapham omnibus".
OP'S actions were not reasonable, so the defence needs to justify this.
However, I'm surprised the State didn't see this argument coming and therefore had OP assesed themselves.
Also, by the State's version, OP is a very devious individual who has lied from the very start. He lied over his girlfriend's dying body, lied while in custody, lied in court. That is a whopping amount of falsehood and I'm surprised they haven't gone for their own psychological assessment to better shore this up.