Lee v. Russ
Factual dispute prevented summary judgment; if subject was standing 30 feet from officer and took only a single step toward officer, jury could find he did not pose an imminent and serious risk when officer fired, despite fact that subject had robbed a pharmacy, unsheathed a knife when officers confronted him, disregarded commands to drop it, and told officer to shoot him; under those facts, right to be free from deadly force was clearly established and officer not entitled to qualified immunity.