Despite tough cross examination from the crown psychiatrist Dr. Lisa Ramshaw maintained her position on Richard Kachkar's mental state around the death of Sgt. Russell, that the now 46-year old man.

"Psychosis was driving his behaviour," Ramshaw told Crown Attorney Christine McGoey.

Ramshaw, like Dr. Philip Klassen, testified that after assessing Kachkar she diagnosed him as suffering from an unspecified psychotic disorder.

She told court that she believed Kachkar "from a psychiatric perspective met the definition for not criminally responsible."

Kachkar's lawyer Bob Richardson has urged the jury to find his client not criminally responsible for Sgt. Russell's death.

Ramshaw rejected the Crown's suggestion that Kachkar took out his frustration in a violent rampage.

"Anger was not the motivating factor," she testified. "People don't run away from their shelter in bare feet...if they are angry. They run because they are afraid."

The Crown has also suggested that Kachkar was attempting to commit suicide by cop, something that Ramshaw disagreed with.

"There was no clear intent to kill himself ," she told court. There's no clear evidence that he was suicidal. He didn't express to anyone he was suicidal.

The final witness to be called by the defence (another psychiatrist) will take the stand on Monday. Evidence is expected to be completed by March 18th.