WARNING: This story includes sensitive subject matter, including discussion of gun violence, gender-based violence and intimate partner violence, that could be triggering for some listeners.

Guest: Michele Henry, staff reporter

It was an unthinkable act of violence: a lone gunman, seemingly angry at fellow residents in his Vaughan condo building, unleashed a torrent of bullets that left five people dead and others injured. It was the deadliest mass shooting in the GTA's recent history and now, we understand more about the man behind the crime. Our country's worst killers do not need notoriety. That's not why we are here today, but it is important to understand motivations and the reasons why. As the Star's Michele Henry found, there are connections to our notorious criminals who have perpetuated violence and we must pay attention to what those things are.

This episode was produced by Brian Bradley, Sean Pattendon and Crawford Blair.