"This is a very tragic case. Ms. Bachelor, from the accounts before me, was a caring person and mother. Mr. Vassell has tragically killed the person who most supported him."

Gabriel Klein was convicted of second-degree murder and aggravated assault in March for the 2016 attack that killed 13-year-old Letisha Reimer and injured her friend.

On Wednesday, a lawyer for Gabriel Klein said his client didn't have the capacity to understand what he did was wrong because of a mental disorder.

The defence lawyer for the man who killed 10 people by deliberately driving a van down a crowded Toronto sidewalk argues his client was incapable of rational choice.

Testifying for the prosecution, Dr. Scott Woodside, a forensic psychiatrist at Toronto's CAMH, said Minassian told him he thought he would fail at his upcoming job.

"I think it would be considered probably extremely irredeemable, like 99 per cent chance irredeemable."

A psychiatrist says the man who killed 10 people in Toronto's van attack has never shown aggression towards others, just himself.

Dr. John Bradford is set to provide his evaluation of Alek Minassian, who has pleaded not guilty to 10 counts of first-degree murder and 16 counts of attempted murder.

A collection of notable cases where those accused of a crime were found not criminally responsible for their actions.

The chair of the board for Autism Canada called the defence claims about autism "completely misplaced."