The Mafia, the Vatican and a secret Masonic society have all been implicated in the murder of ‘God’s Banker’ Roberto Calvi. A passerby on his way to work spotted the 62 year-old financier hanging from London’s Blackfriars Bridge at 7.30am on Friday 18 June, 1982. Calvi was suspended from scaffolding above the Thames, an orange rope tied in a …