Preview Joanne Dennehy's Daughter Shianne Seeks Answers Oxygen Insider Exclusive! Create a free profile to get unlimited access to exclusive videos, breaking news, sweepstakes, and more! Sign Up for Free to View Joanne Dennehy's Daughter Shianne Seeks Answers Faced with her mother's brutal crimes, Shianne Treanor seeks answers and closure from her mother, Joanne Dennehy. Watch the Full Episode
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