Healthy bouncing baby girl Harper Briar dead from Benadryl overdose at daycare

The owner of a Vermont day care center allegedly fed a lethal dose of Benadryl to an infant in her care, causing the baby's death. Nancy Grace explores the death of little Harper Rose Briar and the case against Stacey L. Vaillancourt with experts including medical examiner Dr. William Morrone --author of "American Narcan," Los Angeles lawyer Troy Slaten, psychologist Caryn Stark, crime scene investigator Sheryl McCollum, and Crime Stories reporter John Lemley.

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