Neighbours and co-workers have said Hussain did not display signs of mental illness, as far as they had seen.
Toronto Mayor John Tory, Police Chief Mark Saunders, Community Safety Minister Michael Tibollo and Mulroney met late this afternoon at Queen's Park.
A senior police source, while cautioning that this doesn't mean Hussain wasn't mentally ill, said that often with such people, there are frequent encounters with police - calls from the family for help, suicide attempts or committals to hospital under the Mental Health Act.
Friends of 18-year-old Danforth shooting victim Reese Fallon mourn at a makeshift memorial Monday
A spokeswoman for federal public safety minister Ralph Goodale echoed Saunders' assertions, saying now "there is no national security nexus" to the man behind the attack. It remains unclear what, if any, affiliation the 29-year-old shooter, Faisal Hussain, may have had with the group.
They said he had battled "severe mental health challenges, struggling with psychosis and depression his entire life".
Before the vigil began, Reverend Sarah Miller said she hoped the incident did not "stigmatize those with mental health issues".
Meanwhile, Markham Mayor Frank Scarpitti said in a statement Tuesday that the city will lower its flags in honour of Julianna.
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Sanders reportedly said this is because the former officials "politicized" their roles and "monetized their clearances". Clapper spoke on CNN after Sanders's statement, and said, "I think this is just a very, very petty thing to do ".
"The family is devastated", Erskine-Smith said in a statement, adding that they have asked for privacy while they mourn a young woman who was "smart, passionate and full of energy". "When we heard it was a 10-year-old girl from Markham, all of our hearts dropped".
On Wednesday night, thousands of people marched under the "Greektown" arch hanging over the neighborhood's main street. Parents pushed children in strollers, others brought their dogs. Folks walked past the spots where the gunman fired into restaurants, sidewalk cafes and a park. They held candles in memory of the victims.
Mary Marzo wrote a plea for "love and peace" in chalk at the memorial, saying the city and neighbourhood could use more of both at the moment. A teen from the neighborhood played guitar, another sang.
Police previously identified the other person killed in the shooting as 18-year-old Reese Fallon. Wilson stood near her shop and sobbed, embracing people she knew.
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"I'm out of my mind just thinking about it".
"A lady tried to run and she fell down", he said. He was buried by his family on Wednesday.
"I'll definitely be back", he said.
Subsequent media reports dug deeper into Hussain's life, publishing accounts from former teachers who shared accounts of alarming behaviour he exhibited while still in his teens.
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While authorities tell us to go out and shop and dine as if what happened on Sunday couldn't possibly happen again, it's not lost on most that the shooter gunned down innocent and vulnerable adults and children in a tactical-style mission that mirrored radical Islamic terror events in other parts of the world. "I understand the argument of hunters and fishers, but no one is using handguns to cull the raccoon population in Toronto", he said. "And nobody else is able to defend themselves, which I find to be the greatest breach of freedom - the right to defend yourself, the right to stay alive".