Like Terminator 2, Navalny was an awkward sod but that comes with the territory if you have the balls to stand up to Putin. He was also charismatic, … - John Sweeney

Roughly a year before [his assassination], I had interviewed Nemtsov about Putin's grotesquely corrupt Winter Olympics in Sochi, asking him about the $5 billion road-rail link resort from the coast to the mountain ski resort. Nemtsov replied that: 'It would have been cheaper to have lined this road with Louis Vuitton handbags'. Before meeting Nemtsov, I had spent time with the comically stupid Putinist mayor of Sochi. He had knocked back my question about how gay Olympians would be treated in a city where the Kremlin's homophobic laws held sway by proclaiming: 'There are no gays in Sochi'. When I told Nemtsov about this, he laughed and laughed and laughed for so long we had to trim it down in the edit. He had a beautiful sense of the ridiculous and when I heard he had been shot, I burst into tears.

The received story of Putin's two decades plus in power was of his tolerance of a monstrously corrupt system. The trade-off with the oligarchs was they were allowed to keep much of their fortunes so long as they paid the master of the Kremlin homage and tithes. And they had to keep their snouts out of power. Or else. But that description masks what's really going on. Putin is stealing Russia's wealth, big time, personally, but he cannot be seen to be doing so – psychologically, he hates the idea of being caught out – so he employs proxies to do the stealing for him. True, the oligarchs emerged from the road-crash of the Soviet Union's implosion and Boris Yeltsin's alcoholic incompetence. But with Yeltsin out of the way, a new president had an opportunity to strip the oligarchs of their ill-gotten and obscene wealth and start afresh. Instead, Putin cemented the oligarch system because it best suited his secret urge to take things that rightfully belonged to others.

One of the striking qualities about Vladimir Putin is his longing for legitimacy. Putin's thesis for his degree at Leningrad State University – he graduated in 1975 – was on 'The Most Favoured Nation Trading Principle in International Law'. When I met him in 2014 and challenged him about the Russian shoot-down of MH17, his answer was long and boring and overly legalistic. My working hypothesis is that Putin is a psychopathic serial killer who loves to dress up his bloodlust as legal necessity. Just like Joseph Stalin who always preferred his enemies to be convincted at a show trial before being sent to prison 'with no privileges', code for being shot.