Editor’s note: The story has been updated with information from the Prosecutor General’s Office on the location of the alleged killing of a Ukrainian soldier. Ukraine’s Ombudsman Dmytro Lubinets said on Sept. 17 that he had appealed to the International Committee of the Red Cross (ICRC) and the United Nations in response to a photo that allegedly shows the execution of a Ukrainian prisoner of war (POW) by Russia. On the morning of Sept. 17, a photo of an apparently executed Ukrainian soldier with a sword in his chest and the inscription “For Kursk” appeared on social media. Remnants of gray ta…