The Vancouver man accused of murdering eight people by ploughing a vehicle into a crowded street celebration on Saturday night had been grappling for months with the impact of his brother's murder.

Former attorney general Wally Oppal says that even when an accused killer has documented mental health problems, they can still be convicted for their crimes. Kai-ji Adam Lo, accused of plowing his SUV into a crowd Saturday afternoon, killing 11 and injuring more than 30, had dozens of interactions with police related to his mental health issues.

VANCOUVER, British Columbia — A 30-year-old man was charged with multiple counts of murder on allegations he killed 11 people when he rammed a crowd of people at a Filipino heritage festival in Vancouver, as hundreds attended vigils across the city for the victims and the Canadian prime minister visited the site on the eve of a federal election.