"Fourth Amendment The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
No knock aside, a warrant MUST be person specific. The gentleman killed in this no knock warrant was not on the warrant. He had every right to defend himself and stand his ground against ANY uninvited intruder.
They were looking for one man, at 3 different locations, all of which a Minneapolis judge signed off on for no-knocks... Only to find out the guy they were looking for was in a completely different city...