Did you know that people who run away can also run back? People under stress don’t have the foresight to know if the threat is really over.

Discouraging shooting at fleeing people is good, but there will be situations where fleeing doesn’t mean the end of the threat so we can’t say it is always wrong. Like if someone said they would be back (not the case here), I would sure cut the defending person slack for shooting the fleeing person who threatened future violence.