Dammit, the Supreme Court's decision in Hudson V. Michigan just affirmed the right of the police to perform no-knock police raids. OK, more accurately, it said police weren't supposed to perform no-knocks, but that the exclusionary rule shouldn't apply if they do.
This is not a good thing, y'all.
And it is only going to get the police killed, IMHO.
If I'm a drug dealer and someone comes barging into my house with no warning, they are there for two reasons:
1. They are the cops and they are there to arrest me. Killing one of them will only make the situation worse. I'm better off spending what reaction time I have running away and/or flushing my stash down the toilet.
2. They are rival drug dealers out to steal my stuff. They will kill me if I don't kill them first, so I'd better kill them.
Goodness knows I've never been a drug dealer before, but that certainly seems like a logical way to approach the situation.
So it is absolutely in the cops' best interest to knock, essentially.
Ps. Here's The Cato Institute's amicus brief on the issue.