Evidence of potential war crimes has been discovered in the Ukrainian town of Trostyanets which was occupied by Russian for 30 days. Channel 4 News correspondent Alex Thomson reveals footage of a body of a fighting age man dumped with hands bound behind his back, as well as a suspected mass grave in a garden centre. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn