Never say never, but it would be very rare for a fleeing person to pose immediate threat.
Examples would be people running for a gun, running to get help, running to kill someone else, or running for cover.
I think all of those cases are covered by any imminent threat clause, and thus do not need special exemptions. Just like there isn't an exemption that you are not allowed to shoot a retreating person. It simply follows because (with exceptions) retreating people aren't imminent threats.
I think all of those cases are covered by any imminent threat clause, and thus do not need special exemptions. Just like there isn't an exemption that you are not allowed to shoot a retreating person. It simply follows because (with exceptions) retreating people aren't imminent threats.