A Bangladeshi-born Australian resident admitted within minutes he killed his wife in their Sydney apartment, but claims he isn't guilty of murder due to mental impairment.
Shahab Ahmed has pleaded not guilty to the murder of Khondkar Fariha Elahi in February 2017, claiming the partial defence of substantial impairment by abnormality of mind.
Prosecutors rejected a guilty plea to manslaughter.
The NSW Supreme Court on Wednesday heard the call Ahmed made to triple zero about 10 minutes after stabbing Ms Elahi to death in their Parramatta unit.
In it, the operator answers, confirms his address and then asks "what happened?"
"I killed my wife," he said.
Police who arrived at the unit on the day of the stabbing found Ahmed with blood on the front of his tracksuit pants and were told he wasn't sure how many times he'd stabbed her.
The prosecution and defence both agree the stabbing came immediately after the couple argued about Ms Elahi's secret affair with friend Omar Khan.
Ahmed's barrister has argued his client was substantially impaired by a depressive illness at the time of Ms Elahi's death.
The agreed facts state a general practitioner referred Ahmed to a mental health treatment plan in 2015 while Ms Elahi called police in September 2016 after she believed he would harm or kill himself.
The judge-alone trial before Justice Monika Schmidt will resume on Tuesday.
Australian Associated Press