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A mother who spent almost 14 years in jail for allegedly killing her toddler has had her conviction quashed.

Ontario's top court today ordered a new trial for Tammy Marquardt because flawed evidence from a disgraced pathologist helped convict her.

Both prosecution and defence agreed her conviction in 1995 in the death of her two-year-old son Kenneth was faulty.

That's because pathologist Charles Smith wrongly concluded the boy was strangled or smothered.

Ms. Marquardt, 38, who was living in Oshawa, Ont., at the time, has always maintained her innocence.

Mr. Smith was recently stripped of his medical licence after admitting to professional misconduct and incompetence.

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