Russian supergrass Alexander Perepilichnyy, 44, found dead outside leafy Surrey mansion

Russian supergrass, 44, found dead outside leafy Surrey mansion (and he's the FOURTH person linked to multi-million pound tax fraud to die mysteriously) Alexander Perepilichnyy provided evidence against corrupt tax officials involved in fraudHis evidence showed they had become extremely wealthy shortly after a British investment fund was ripped off in a 144m scam The 44-year-old collapsed in his road, one of the most secure in the UKPolice are treating the death as 'unexplained'He is the fourth person linked to the shadowy 'Klyuev Group' to have died suddenly | UPDATED: 12:04 GMT, 28 November 2012 Murky underworld: Alexander Perepilichnyy, 44, collapsed in his cul-de-sac after helping prosecutors investigate corrupt Russian tax officials A Russian supergrass who was helping prosecutors to uncover a multimillion-pound money laundering scam operated by his fellow countrymen has died at his Surrey estate in mysterious circumstances. Wealthy Alexander Perepilichnyy, who collapsed outside his mansion in a gated Weybridge cul-de-sac, fled to Britain three years ago after falling foul of a powerful crime syndicate.