MONTREAL – A teen accused in the slaying of his 14-year-old sister will undergo a psychiatric evaluation to determine whether he’s fit to stand trial.

Doctors will also determine whether Maor Attar can be held criminally responsible for the alleged murder.

The 18-year-old was not present in the Montreal court house Wednesday morning. His lawyer, Daniel Lighter, explained the young man was too ill to appear in court.

“He is sick,” he said, noting that his client is already being held for treatment in a Montreal psychiatric hospital.

“He’s schizophrenic, has psychotic episodes and hears voices.”

Attar is scheduled to be back in court Oct. 8, following the completion of his evaluation.

On Aug. 9, Shirel Attar’s body was found by her mother and sister in the family home in a Montreal suburb. She had been stabbed to death.

Attar was later arrested and charged with her murder.