In my mind this issue is a simple one and it's represented by the phrase "due diligence". If you're planning on raiding someone's home with deadly force it's your responsibility to do appropriate research. In the case of this story it appears the police failed to do this.
Being a cop is a dangerous job and they deserve our respect and appreciation. Officers that make stupid mistakes and endanger those they are supposed to protect give the police a bad name and they should be punished.
