Andrea Canning reports on the recent developments in the Mary Yoder case in Whitesboro, New York in “Poison Twist” | Dateline

Sixty-year-old chiropractor Mary Yoder was the picture of health. But in July of 2015, she fell seriously ill and was rushed to the hospital. By the time family members arrived at the hospital, Mary was fighting for her life. The family kept vigil in the waiting room. Then came the awful news. Mary Yoder was dead. It took months to figure out what had happened to her. Turns out, she had been poisoned. But by whom? Authorities arrested an unlikely suspect, who went on trial -- twice. But now, nearly a decade later, a dramatic twist that would change everything… For the full story, watch “Poison Twist” on Peacock now. You can also watch on the NBC app or listen on our podcast. After you’ve finished the episode, watch Mary’s loved ones share fond memories of her. Watch as Jeanna Marraffa, Clinical Director of the Upstate New York Poison Center, explains her decision to test for colchicine in Mary’s case. Plus, listen to this week’s episode of Talking Dateline with Andrea Canning and Josh Mankiewicz, in which they take you behind the scenes of the episode and answer questions from social media.