When Leonid Pliats and his boss were shot in the back by Russian soldiers, the killing was captured on CCTV cameras in clear and terrible detail. The footage, which was obtained by the BBC, is now being investigated by Ukrainian prosecutors as a suspected war crime.
It was the height of the fighting around Kyiv and the main roads into the capital were a battlefield, including around the bicycle shop where Leonid worked as a security guard.
But this was no firefight: the video clearly shows heavily armed Russian soldiers shooting the two unarmed Ukrainians and then looting the business.
We have pieced together the full sequence of events, matching what was recorded on multiple CCTV cameras around the site with the testimony of people Leonid phoned that day, as well as the Ukrainian volunteer fighters who tried to rescue him.
The Russians arrive in a stolen van daubed with the V sign used by Russian forces and the words Tank Spetsnaz in black paint. They wear Russian military uniform and approach with their guns up, fingers on the triggers.
Leonid walks towards the soldiers with his hands up to show he's unarmed and no threat.
