After a 911 call for unknown trouble, officers arrive and find a man in distress, wielding some kind of object. Three words, known to those in law enforcement as the "police challenge," pierce the morning air. "Drop your weapon!" Seconds later, gunshots. It's an all-too-familiar scenario at coroner's inquests in Canada, according to some mental health experts. This week, a jury in Ontario is expected to reveal a list of recommendations that are supposed to give police the tools to respond effectively to civilians in crisis. The recommendations come after a weeks-long inquest into the fatal police shooting of Michael...