What separates you and a law-abiding citizen ‚Äî from the common criminal? Your right to use deadly force. But when can you use it? And how can you know the physiological changes your body will experience in a deadly force incident? When you’re your family’s first line of defense, you need to know what to expect. When to Use Deadly Force‚ will answer these questions so you’re not left hanging if you ever need to protect yourself, or your family, with deadly force.