Both Crown and defence lawyers at the first-degree murder trial of a woman accused of fatally stabbing a complete stranger in a downtown Toronto Shoppers Drug Mart agreed she should be found not criminally responsible due to mental illness.

Rohinie Bisesar, 43, pleaded not guilty in the December 2015 death of Rosemarie Junor, who was stabbed one time directly through the heart while she shopped for lotion at a Shoppers Drug Mart location in the city's financial district. Junor, 28, was on her lunch break at the time from her nearby job as an ultrasound technician.

She died in hospital four days after the attack.

During the first day of Bisesar's trial on Friday, Crown lawyers said the entire incident was caught on security camera video. A number of witnesses also provided statements to police.

According to the statement of facts filed in court, Junor was on her cellphone with a friend when the stabbing occurred.

Forensic psychiatrist Dr. Ian Swayze told the court Bisesar has schizophrenia and lived with severe delusions and hallucinations that only abated through treatment.

During her closing arguments, Crown prosecutor Beverley Richards said she agrees with the defence that Bisesar should be found not criminally responsible in the case.

The judge presiding over the trial says he'll deliver his decision next Tuesday.