What companies did he bankrupt? I am not aware of that. Bain Capital acquired businesses and helped them to expand with sometimes spectacular results.
Armco, GST, Dade.... I'm sure there are more.
They charge 2% management fees, pay themselves dividends, borrow money by using assets as collateral, and if they improve the overall earnings by a certain percentage (not tough to do for a lot of companies), they earn 20% on top of that, to which they pay 15% taxes (or in Romney's case just filter it through the Cayman Islands and pay 0%). If the company goes bankrupt, they keep their 2% management fee, all the dividends they paid themselves, and all the money they "borrowed" against the companies assets. They brush their hands off and walk away scot-free. They basically cannot lose.
I'm not saying they are aiming to bankrupt companies to earn money. Obviously it's in their best interest to turn large companies around, earn profits, and take on more projects with lots of investors. However, when a company is in a downward spiral and you milk it dry, that is illegal and unethical. In the case of Dade, the company went bankrupt under Bain yet they walked away with $242 million dollars on a $30 million dollar investment.
Jerry Sandusky contributed to charities, worked with the poor, and took in young boys and gave them hope for the future.