On the question how does the i-c investigate fraud cases most i-c have their own PI. But New York State has a fraud investigation unit that will look into WC fraudulent cases. Security cameras are all over big companies right down to the corner store so they can be checked if an employee files a claim that he was hurt. A employee of a company was just busted for making a false claim, they checked the cameras and caught him faking an injury. That is now being investigated, by the states FIU for fraud.