In October 1975, two Ottawa high schools were rocked by murders committed by a troubled student who then took his own life. As the anniversary approaches, CBC is looking back at the changes, both personal and societal, that took place in the event’s wake. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: