Three people, including a police officer, were killed. The gunman dies as well. The crimes stretched over three cities, five police agencies and hours of the middle of a day in Southern Ontario. But more than a week after the shooter was killed by police, there still isn't much to explain why this happened.What do we know about the victims and the suspect? Why would he begin his attack by ambushing a cop in a coffee shop? What will we learn in the weeks ahead? And, once again, without a proper trial, how much of what police do eventually discover will they share with the public and the media?GUEST: Wendy Gillis, crime and police reporter, Toronto Star (Read a minute-by-minute account of the shootings right here.)