On a side note, US judges and juries are still willing to...

[Alcon]

HP.  He's trying to get out of his death sentence.

What makes you think so?

By trying to make it look like he was too insane, so he should have been given a verdict of not guilty on reason of insanity.

He's already been convicted and sentenced.  And don't you think there should be a psychiatric evaluation, instead of just presuming he's getting out of a conviction?  By any other logic logic, no one should ever be found not guilty by insanity because they must be faking it.