In multiple shot self-defense situations the after-action liberal response is often "Why did you have to shoot him more than once?" Why? Because one shot does not always stop the threat.

We often hear how we need to only use as much force as is necessary to stop a threat. Perhaps that's gotten into our heads enough to cause us to use less than is enough.

In an altercation where lethal force is called for, the best scenario (from a liberal perspective) is that everyone lives. The best perspective from the conservative perspective is that everyone but the bad guy(s) get to go home safely. The worst scenario is that no one goes home. If you want to be the one who goes home you must ensure the threat(s) you face is/are neutralized before lowering your guard.

When I took the motorcycle rider course ~30 years ago, they taught something that is easily modified to work in responding to these situations: (Note: With proper training & practice, these steps can be worked through in fractions of a second).

Scan: Be aware of your surroundings.
Identify: Identify risks/threats to your safety.
Plan: When you've identified potential risks/threats, work through the possible responses to handle those risks/threats.
Decide: Decide which of the plans you've considered will provide you with the best possible outcome. Understand that even the best plans need to be fluid as circumstances change.
Execute: When the time is right, execute your plan without hesitation and continue on until it is complete and/or all threats are neutralized.