Bankers convicted of helping Putin's friend Four bankers who allowed a friend of Vladimir Putin to deposit huge sums in Swiss banks have been found guilty of lacking due diligence. The former executives at the Zurich branch of Russia's Gazprombank were given hefty fines for helping musician Sergei Roldugin, nicknamed "Putin's wallet". Mr Roldugin reportedly paid in around $30m (£24m) between 2014 and 2016. He gave no credible explanation of where the money had come from. Under Swiss law, banks are required to reject or close accounts if they have doubts about the account...