NBC's Dateline will shine national spotlight on the local murder case that had everyone talking and sharing their own theories of what really happened.

Dateline's special, Poisoned, takes a closer look at death of Mary Yoder, the subsequent investigation and Kaitlyn Conley.

Dateline's webpage includes a promo of the episode, which airs Friday night at 9 p.m. (eastern) on NBC, along with this description:

''The unexplained death of a beloved chiropractor becomes a criminal investigation when authorities discover she’d been poisoned. Detectives focus on her own family before an anonymous letter leads them to the unlikeliest of suspects. Andrea Canning reports.''