The story was chronicled in detail in the mega-hit New York Times podcast Caliphate: a young Canadian man who claimed he had travelled to Syria to join ISIS, committing executions on behalf of the group before becoming disillusioned and fleeing.

Now, Shehroze Chaudry, a.k.a. "Abu Huzaifa al-Kanadi" has been charged by the RCMP not for being a member of ISIS, but for allegedly lying about it. He's now facing a terrorism hoax charge.

Today, terrorism and radicalization expert Amarnath Amarasingam shares his perspective on the story. He's been in contact with Chaudhry for about four years, at first as part of his research into ISIS fighters and returnees, and later as someone who works to help reintegrate former extremists.