How, if at all, might Russia be punished for its war crimes in Ukraine?

Russian troops retreating from Kyiv have left behind a landscape of atrocities. The mayor of Motyzhyn, a suburb of the capital, was found blindfolded and shot, apparently by Russian forces, along with her family. An eye witness told Human Rights Watch, a charity, that Russian soldiers threw a smoke grenade into a basement in Vorzel, near Irpin, then shot a woman and her child as they emerged into the light. Another saw soldiers round up five men in nearby Bucha, forced to kneel and pull their shirts over their heads, and shoot one in the head before 40 witnesses. In all, said Ukraine’s prosecutor-general on April 3rd, 410 civilians had been killed around Kyiv. Many more will be found.