- Police visited home of Canada school shooting suspect multiple times over mental health concerns The Guardian
- Before Mass Killing, Mental Breakdowns and Online Violent Extremism The New York Times
- ‘Everyone knows somebody affected’ – small Canadian town united in grief after mass shooting BBC
- Transgender ex-student identified as alleged suspect in Canada school mass shooting that left at least 9 dead Fox News
- Guns and mental health struggles: What the apparent online footprint of the Canada school shooter tells us CNN
