The 1907 Hague Convention IV and the Geneva Conventions prohibit harming enemies who have surrendered or are unarmed. Once a combatant has clearly expressed their intention to surrender, they are considered hors de combat and are protected from attack.
I learned a long time ago to stick a few band-aids (plasters if you live in the U.K.) in my wallet. They take virtually no space and get used surprisingly often, either for you or for someone else.
The 1907 Hague Convention IV and the Geneva Conventions prohibit harming enemies who have surrendered or are unarmed. Once a combatant has clearly expressed their intention to surrender, they are considered hors de combat and are protected from attack.
He was both unarmed and trying to surrender.