There is precedent...

Though he did put up a valiant fight by stabbing at them with his goatee

There's an idea among centrists that only backwards, undeveloped countries try and punish former leaders for their crimes. I think it's backwards and undeveloped not to.

How many Americans died from covid and on Jan 6?
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The peculiar nature of the trial reflects not simply the fact that a King was on trial but that both the King and his judges took their stand on what are still crucial principles - the King on his right to trial by a properly constituted court acting on the basis of established law, and his accusers on the need to call to account a King they had described as a tyrant who shed the blood of his people.

The King's persistence disconcerted the judges, but there was little doubt about the outcome, and the death sentence was proclaimed on 27 January.""

But he did cause a civil war, and Cromwell, his main opponent, was staunchly opposed to it