ABC's '20/20' to explore case of ex-Grand Forks surgeon who murdered his wife in New York

Although under suspicion, Dr. Robert Bierenbaum evaded criminal charges for 14 years due to insufficient evidence and, in part of that time, split his plastic surgery practice between Grand Forks and Minot. "20/20" explores "Jekyll and Hyde" attributes of successful surgeon and his relationship with his wife whose body was never found.

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