17-year-old former student charged with attempted murder after Lester B. Pearson lockdown  CTV News17-year-old charged with attempted murder of Calgary high school student  Global NewsStudent assaulted at NE high school; Calgary police arrest suspect  CityNews Calgary17-year-old charged with attempted murder following Thursday incident at northeast Calgary high school  Calgary HeraldFormer Lester B. Pearson student charged with attempted murder at Calgary high school  CBC