A Deadly Mass Shooting in Canada, and the Latest on the Search for Nancy Guthrie

Plus, how extremist groups are using video games to recruit children online. Here’s what we’re covering: 9 Killed and 25 Injured in Shootings at School and Home in British Columbia, by Francesca Regalado Man Who Was Detained in Nancy Guthrie’s Disappearance Is Released, by Nicholas Bogel-Burroughs, Chelsia Rose Marcius and Jill Cowan Grand Jury Rebuffs Justice Dept. Attempt to Indict 6 Democrats in Congress, by Alan Feuer, Glenn Thrush and Michael S. Schmidt Homeland Security Hires Labor Dept. Aide Whose Posts Raised Alarms, by Evan Gorelick F.D.A.