His other option would be to try to get the crooks to drop their weapons and get their hands up. But note that the robber on the right turns and points his weapon at Williams who then shot him first. So taking one out which resulted in the other one running was the best approach.
The lesson to be learned here is that if you carry a concealed weapon know how to fire it and don't hesitate to shoot in a situation like this when the gunman is ready to shoot you.
The lesson to be learned here is that if you carry a concealed weapon know how to fire it and don’t hesitate to shoot in a situation like this when the gunman is ready to shoot you.
and take out the the biggest threat first when confronted with multiple criminals.