Lavish London mansions. A hand-painted Rolls-Royce. And eight dead friends. For the British fixer Scot Young, working for Vladimir Putin's most vocal critic meant stunning perks – but also constant danger. His gruesome death is one of 14 that US spy agencies have linked to Russia – but the UK police shut down every last case. A bombshell cache of documents today reveals the full story of a ring of death on British soil that the government has ignored.