The man who allegedly plowed through a crowd enjoying a Filipino festival in southeast Vancouver on Saturday, killing at least 11, lost his brother to murder last year. Kai-ji Adam Lo, charged Sunday with eight counts of murder, had dozens of interactions with police related to his deteriorating mental health. Vancouver Police said that more charges are expected as the investigation continues. And they said Sunday that some of the victims of the unprecedented slayings remain unidentified. About 10 Vancouver officers executed a search warrant just after 7 p.m. Sunday at the east Vancouver house Lo, 30, shared with his...