Kroger CEO resigns amid controversial investigation

Everyone has been told at least once in their lives that to reach the top one must start at the bottom and work their way up slowly.

Many CEOs begin their careers this way, working in stores or banks for minimum wage. Some eventually climb the corporate ladder until they reach one of the highest positions one can hold at a company. 

For Kroger CEO Rodney McMullen, this is exactly the path his career took.