Perhaps they should undertake another competency review, first, if the last one was seven years ago?
My Spidey-Sense tells me that the guy has been bullsh---ing all along but there is documentation to the contrary, so, it might make sense to take the time to be sure, one way or another, before pulling the trigger on that miscreant.
You think he's been bullshitting since 1978, all so he could get away with murder more than 20 years later?
Nope.
Assuming that the trial process found him sufficiently competent at the time of the commission of the crime, so as to be held accountable in a capital case...
Which, of course, they must have, in order to have reached this point...
Then... I think he's probably had very long periods of remission and long stretches where he was as competent as any other person walking the streets.
I think he's far more mentally fit that he lets on, and that much of the dress-up, etc., is mere smoke-screen to avoid the full penalty of the law.
His filing of petition after petition indicates a fairly strong presence of mind - a functional one, at that.
I'm not trained in such things and make no pretense at professional credentials in this area.
But, based on circumstances, I sense one whole helluva lot of 'bulls----ing' on his part.
And I think they ought to conduct another competency review, to be sure, before they kill the sonofabitch.
Grant him a stay of execution - a few weeks, or a month or two - sufficient to conduct that fresh review, and to have it validated by one or two external sources, and...
If, in their professional opinion, they determine he's incompetent, then, the execution is put on hold, and any legal work that he has done for himself, re: appeals, etc., during the estimated duration of his latest manifestation of mental illness, is legally reviewed, and, if need be, set aside, and repeated, by competent legal representation...
If, in their professional opinion, they determine that he's competent, then, off to Hell he goes, with the plunger-pusher performing a public service... taking out the trash.