It was a sensational heist — $20 million in gold stolen from Canada's busiest airport. On a chase that spans the globe — from India to Dubai to rural Pennsylvania, we make surprising discoveries about the gold, guns and the suspects still at large.

Tens of thousands of tax accounts have been hacked and hundreds of millions of dollars have disappeared as criminals game the system by stealing identities and filing bogus returns. Could the CRA's deals with tax companies be partly to blame?