Everyone in Iowa was on the edge of their seats waiting for the Hot Lotto drawing that night. The grand prize was up to $16.5 million dollars, and finally on December 29 2010, someone actually won the whole amount.

The mystery winner had managed to match every number right down to the bonus number: 3 12 16 26 33 and 11. It was a lucky 1 in 11 million winning chance. Local news headlines became flooded with stories about the winner.

But there was one problem - the winner wasn't coming forward. And in later days and weeks, the situation became even stranger. Watch the video to find how it panned out and why the FBI got involved…