How a little-known Supreme Court ruling unmuzzled reporters—and changed Canadian journalism:

The truth about Rob Ford was dragged into public view one story at a time, in every case without the benefit of irrefutable proof. There were no Breathalyzer tests proving that the mayor had a drinking problem, and while three journalists reported seeing the video of the mayor smoking crack, it would be months before the police confirmed that it even existed. Through it all, Ford and his older brother Doug, a city councillor, fought back by vigorously advancing versions of events that were the exact opposite of what happened. How, then, did Doolittle and others manage to get at the truth without risking the mother of all defamation suits?