Jurors began deciding the fate Friday of three members of a Montreal family accused of killing four other family members, unaware that there was an eyewitness to some events at the isolated spot where the victims were found dead.

The lone eyewitness did not testify at the trial and jurors were not told of his existence.

His account is among dozens of pieces of information that was withheld from the jurors, in some cases because of rulings by a judge before or during the trial. The information could not be reported publicly until the jury retired to begin deliberations.

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