Dear Mr. Bissonnette

In 2017, Alexandre Bissonnette went into a mosque in Quebec City and gunned down six people. Is he a lone-wolf terrorist or a mentally-ill young man turned monster? In the documentary Dear Mr. Bissonnette, Mark Kelley investigates the path of a killer using the people closest to him and real life Mindhunter profilers, to discover mass shooters like Bissonnette are always hidden in plain sight.

The show’s own verdict is on its page.