Isn't it about time they revoked the few remaining parts of the US constitution that haven't been totally ignored by the US government and security services
No need. Those parts have been safely buried under several thousand tons of legislation and judicial rulings.
As for any pretext of guarantees of protection of individual rights to life, liberty, and the pursuit of happiness, witness Miriam Carey--deprived of all, thus far, with complete impunity.
Mistakes are made, and people die as a result. The officers who fired the fatal shots should be accountable, but perhaps are due a bit of understanding. Their leaders are another matter. They are the ones responsible for creating the presumptive right to kill. Their sickening and self-serving statements praising the heroism of their respective organizations laid it out there for everyone. They could not wait to get in front of the cameras, truth and justice be damned.