One call, then another, then a third. Ottawa Citizen reporter Aedan Helmer vividly remembers what it was like in the newsroom on Sept. 22, 2015 when the police scanner crackled with the news that three bodies had been found in cottage country – and the killer was still on the loose. In the days and months that followed Helmer would come to understand just how tragic — and preventable — the killings were.  Learn more about your ad choices. Visit megaphone.fm/adchoices