ThirdShifter Are you claiming this is not true and Canada does not have dual sovereignty?
No, I’m saying that you wouldn’t be entertaining the discussion if the person at question hadn’t done something you find personally reprehensible and/or abhorrent, and that the purpose of your suggestion isn’t about how best to prevent recidivism or protecting people, but finding a way and an excuse to punish him personally. It doesn’t appear to be about justice for you, it appears to be about vindictiveness.
We don’t need to go looking for additional things to throw at him: 7 counts of murder where there’s really no question of who did it will be enough to put him away for a long time. And as I said above: if, for some reason, he does actually manage to walk away from this, that’s when we entertain a discussion about what went wrong & how we can do better.