72 Hours: True Crime

A Toronto real estate broker fails to return home at the end of the day. Her family can't find her. But the police do - dead in a utility closet in her downtown office. The DNA found on her body is tested against 150 different men. No match. The case runs cold. And then an office employee suggests police investigate a former maintenance worker who has slipped under the detective's radar. A maintenance worker familiar with the building was fired from the job due to a troubling history of violence.