That didn't happen, did it? The police don't start randomly shooting on these raids.
Now there is where you are so wrong. Shooting occurs quite frequently on these "mistake" raids and they don't just happen "now and then", they are a growing epidemic in the US. No knock warrants and the war on drugs is to blame. Every police force wants a swat team. These teams are basically illegal in the US as far as I am concerned and so are no knock warrants.
Humans and Dogs are killed constantly now by police making raids on the wrong houses or just making a routine call on houses. Our police are getting out of hand and the main blame can be laid to the trashing of our constitution.
Is it any wonder when THIS is what is passed off as a constitutional scholar???