Finding the dead in mass graves left by retreating Russian soldiers

In the early weeks and months after the beginning of Vladimir Putin's war, Ukrainian forces liberated areas that had been briefly under Russian occupation. Those forces discovered atrocities committed by the Russian military. We look back at a report from The World's Shirin Jaafari, who visited a mass grave site in Izium, Ukraine. She gives an update on the investigation into how these mass graves came to be, and the prosecution of war crimes.