Uh, we don't do the "Death Penalty" in Canada. That is for primitive, uncivilized cultures.
Karla is very clever, manipulated the system, played the dumb lawyers and judges like puppets, and I read she got her psych degree in prison. She was uncooperative with psych "therapy" and I doubt any prison shrink would be able to put anything over on her, therefore I doubt any diagnosis other than psychotic sociopath = Female Hannibal Lecter.
Some people STILL want to believe her a "victim" of some male Sven Jolly.
Rrriiiiight....