Paul Johnston, Entellium

Entellium was a successful CRM software startup and that’s why Intuit offered $100 million to buy the company. But CEO Paul Johnston turned down the offer, which the prosecutor believes perhaps because Johnston knows that the company's books could not withstand the inspection of a due-diligence audit. Johnston was later found guilty of reporting false revenues to get $50 million investments. In 2009, he was sentenced to 3 years of federal imprisonment, during which he admitted his guilt and apologized to everyone. Intuit, later bought some of Entellium’s assets after it went bankrupt.