Why haven't 'Flash Boys' claims been proven?

It's a year since Michael Lewis' explosive claim in "Flash Boys" that the market is rigged. Why haven't any of his claims been proven yet?
Data & News supplied by www.cloudquote.io
Stock quotes supplied by Barchart
Quotes delayed at least 20 minutes.
By accessing this page, you agree to the following
Privacy Policy and Terms and Conditions.