Over the course of his career Jeff Cox has made notable contributions to both local and state government through his research, writing, and investigations.
In 2009, Jeff Cox headed an investigative team into missing casino money that was intended for local development in East Chicago. Cox authored reports of the investigation's findings and developed the legal theory of "constructive trust for public benefit," which was victorious in the Indiana Supreme Court.
In 2003, Cox was a member of the task force that investigated vote fraud in the 2003 primary elections in East Chicago and Schererville, Indiana. The outcome of the investigation led to the ousting of the Mayor of East Chicago.
Cox was involved in early stages of prosecution of the civil RICO case for the 1999 "Sidewalks for Votes" scandal in East Chicago.
Cox briefed, argued and defended Indiana's retention of interest earned on more than $300 million in Unclaimed Property Funds.
Cox saved Indiana over $3 million in an eminent domain trial involving bridges over the Ohio River near Louisville.
During his time as Deputy Attorney General, Cox investigated such charitable entities as Gary Urban Enterprise Association, Fort Wayne Neighborhood Housing Partnership and the Schwab Foundation.