Russian businessman Sergei Mavrodi, whose MMM pyramid scheme deprived millions of Russians of their savings in the 1990s, has died of a heart attack, according to Russia media. .
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Reports said the 62-year-old was rushed to the hospital late on March 25 with pain in his chest and died several hours later.

Details here http://www.skillzah.com/2018/03/26/mmm-founder-dies-of-heart-attack