Opinion: Why we need a new Nuremberg trial to make Putin pay

Philippe Sands - Professor Philippe Sands (UCL Laws) puts forward a plea for the world to hold a tribunal just like the one which condemned Hitler's henchmen. Mr Putin's invasion of Ukraine, and the crimes being committed in his name, feel very personal to me. It is where many of my family once lived. I visited for the first time in October 2010, to give a lecture on 'crimes against humanity' and 'genocide', two crimes invented in 1945 for the famous Nuremberg Trials, in which former Nazi leaders were indicted and tried as war criminals by an international military tribunal. As an academic and lawyer, international crimes are my speciality, my day job. I decided to accept the invitation to Lviv - a city in west Ukraine I had barely heard of - after I realised that it was once called Lemberg and was the place of my grandfather Leon's birth when the city was in the Austro-Hungarian Empire. I found the house where he was born and learned that he fled the city in September 1914 aged ten, with his mother and two sisters, refugees from occupying Russian forces who had already killed his brother.