The Russian military may have committed war crimes in its brutal attack on the Ukrainian city of Mariupol. International law expert Philippe Sands explains how Vladimir Putin could be held accountable.This episode was produced by Will Reid, edited by Matt Collette, engineered by Efim Shapiro, fact-checked by Laura Bullard, and hosted by Noel King.Transcript at vox.com/todayexplainedSupport Today, Explained by making a financial contribution to Vox! bit.ly/givepodcastsLearn more about your ad choices. Visit podcastchoices.com/adchoices