Corruption at the top
Corruption at the top

In 2006,Tom Coughlin, a former vice chairman who worked closely with legendary founder Sam Walton, pleaded guilty to wire fraud and tax evasion. After an internal investigation that found improper use of gift cards and other expenses, Coughlin admitted he stole thousands of dollars from Walmart to upgrade his truck, buy beer and pay for hunting rights.

Walmart stumped union critics when Coughlin said the reimbursement were for money spent out of pocket for a "union project" aimed at keeping unions out of stores.



By Nin-Hai Tseng - Last updated April 24 2012: 4:32 PM ET