Cruel and unusual punishment is about sentencing, after a trial. These folks didn't go through a trial.
No, I don't think either person deserved fifteen years of hard labor, or five years.
What actually happened is not that they were executed on the spot, no.
You mean "you're right, saying the victim was cruelly and unusually punished isn't a good argument here."
You've just presented a new argument.
Many, many people are killed by LEO each year; how many are considered 6th amendment violations? (None. LEO is not out there "administering judgement", they are responding to deadly-force encounters, guns, etc)
Oh, just spontaneously died then? You know if you play the video backwards it shows ICE applying lifesaving bullet removal techniques on Mr. Pretti and Mrs. Good