Found in a pool of blood, Arkady Babchenko, a Russian journalist and critic of President Putin, was declared murdered in Ukraine in May. But a day later he was back from the dead, appearing alive and well at a Kiev press conference. Speaking to all the key players for the first time, Jonah Fisher has the inside story of how to fake a murder. Why did Ukrainian security services stage his death? And in the propaganda war between the truth and fake news, what, if anything, did it achieve?