A Harvard professor says CNN Headline News host Nancy Grace’s relentless questioning of a Florida mother three years ago contributed to her suicide, according to a filing in the family’s wrongful death case.

Grace launched aggressive nightly coverage of 2-year-old Trenton Duckett’s case shortly after he disappeared in 2006, usually with a collection of analysts. When the boy’s mother, Melinda Duckett, appeared by telephone two weeks into the case, speculation was beginning to narrow on her possible involvement.

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