Hassan Diab is appealing a 2011 court decision and the Canadian government's order to extradite the University of Ottawa sociologist to France, despite the court's concerns that the case was "weak."
Diab denies any involvement in the first fatal attack against the French Jewish community since the Nazi occupation in World War II, which left four dead and many wounded.
At the Court of Appeal for Ontario, in a room filled with more than a dozen Diab supporters, lawyer Marlys Edwardh sought to discredit handwriting analysis undertaken by France's expert, Anne Bisotti.
The handwriting sample is considered to be the "smoking gun" in the decision to extradite Diab, Edwardh said.
Edwardh also questioned the decision of Justice Robert Maranger to clear Diab for extradition, suggesting the Canadian judge presumed the reliability of the evidence based on Bisotti's bonafides.
Bisotti's report was the third such analysis to be submitted to Canadian courts from France. The first two were dismissed after criticism by the defense.
The hearing continues later today and Tuesday.
