A judge in the trial of two top advisers to former Ontario premier Dalton McGuinty has ruled a key prosecution witness won't be allowed to deliver opinion evidence in court because he's not independent. The witness, Robert Gagnon, was a computer forensic specialist with the Ontario Provincial Police for more than 20 years. The defence argued that he was too deeply involved in the investigation to be an impartial expert witness, and Judge Timothy Lipson agreed. The judge disqualified Gagnon as an expert witness in part because he had "expressed bias with respect to the guilt of the defendants." "Apart from giving Mr. Gagnon a separate lab to conduct his work, the investigative leads took no measures to ensure that Mr. Gagnon's expert opinion evidence would be independent and impartial.

Source: CBC News September 28, 2017 15:15 UTC