Not enough facts to decide what the officers did. A lot of times they respond to a call, not really to arrest right away, just to check things out. After all, they were called in. It appears, from the story, they showed up to a woman aiming a shotgun at them, and took direct threat. They WILL shoot someone for that. Right now, giving the facts, it seems the real blame should be on the census worker and the supervisor for calling in the cops.