During a no knock, do the LE officers entering always announce who they are? And how liable would a person be if it were found out to be the wrong house and an officer were to be injured?
Try google and "Ryan Frederick" for a fairly recent event. Conflicting information has been going back and forth about it, especially regarding whether the police announced themselves and whether Frederick understood what was going on since he had been asleep. More info. came out that the police didn't have any substantial evidence against Frederick prior to the raid, making the raid even more suspicious. I don't really support either side, as it seems both parties made bad decisions at one point or another.
All of it is scary stuff if you ask me. Cops have to do their job, and armed citizens feel the need to defend themselves. Too many variables can throw a big pile of poo on everyone's day.
---Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.---
---Enlightenment is the ability to take infinite pains---