A judge is expected to issue a verdict Thursday in a trial in which both the Crown and the defence agree the defendant should not be found criminally responsible for beheading a fellow Greyhound passenger, last year.

Both sides agree Vince Li is mentally ill and should not be found guilty in the gruesome murder of Tim McLean last July.

"In fact the Crown said it cannot ask the court to convict Li of second-degree murder when all evidence shows that he should be found not criminally responsible," said CTV's Jill Macyshon, reporting from outside the Winnipeg courtroom.

The trial wrapped up Wednesday after a psychiatrist took the stand and testified for the defence, saying Li, 40, heard the voice of God telling him to kill McLean or risk being killed himself.

Dr. Jonathan Rootenberg said Li was psychotic and was in no state to tell the difference between right and wrong.

"The attack was sudden and came as Li caught a glimpse of the sunlight and heard God's voice telling him that McLean was a threat," Rootenberg testified. "The voice said, `Do it now ... If you don't, he's going to kill you."'

Rootenberg said Li was psychotic and unable to know that killing, beheading and dismembering McLean was wrong.

"It wasn't his hands doing that," he said. "It was God's hands and God doing that through him."

One day earlier, a psychiatrist who testified on behalf of the Crown said essentially the same thing.

"Both said Li is schizophrenic, he was suffering from auditory hallucinations at the time of the murder, and he is mentally ill and needs to be treated and should not be sent to prison," Macyshon told CTV Newsnet.

It is rare for both the defence and Crown to agree on such a high profile case. Normally the Crown attorney pushes for a stiff sentence for the defendant.

"The family wants Li to spend his life in prison -- a life for a life they say -- but the Crown says legally it has no case to do that," Macyshon said.

An agreed statement of facts was read in court on Tuesday. It said that Li attacked his victim "for no apparent reason" and ignored the other passengers on the bus as he repeatedly stabbed McLean.

The bus pulled over near Portage la Prairie, Man. as Li continued his attack on McLean's body.

Passengers fled the vehicle and stood outside, as Li remained locked inside.

Li attempted to leave the bus numerous times, according to the statement, but when he found he was unable to do so, he returned to McLean's body and continued to mutiliate it.

Body parts were found in plastic bags throughout the bus, and some, including his heart and eyes, were never found, presumably eaten by Li.

Dr. Stanley Yaren, the psychiatrist who testified on behalf of the Crown, told the court that Li believed he had to cut up McLean's body, because he believed he would come back to life otherwise.