Groupon head Andrew Mason is the latest CEO to make a shocking departure.
19 / 21
John Rigas (Adelphia) -- The Rigas family founded the cable provider, but John Rigas was forced to retire as CEO in 2002 after being indicted for securities, bank and wire fraud. Adelphia filed for bankruptcy after admitting that the former CEO and his two sons had failed to record $3.1 billion in loans.