John Nicol and Dave Seglins, reporting for CBC News:
CBC News received several tips after a recent story about a company shipping the same load of biodiesel back and forth by CN Rail at a cost of $2.6 million in the summer of 2010. It turns out the shipments were part of a deal by a Toronto-based company, which made several million dollars importing and exporting the fuel to exploit a loophole in a U.S. green energy program.