This is a way around the 4th amendment. That should not be allowed. Any excuse that it stips prosictuon or pursuit of a bad guy is a BS excuse. Do it legally and within the constitution. We need to fight for the rights if we don't eventually we will have none because they have taken them all away under the guise of catching the bad guy and terrorists. Whats next let them shoot 1st because they don't have the proof you have a gun yet?