Chad and Lori Vallow Daybell go on trial in January on charges related to the murders of Chad’s wife Tammy Daybell and Lori’s children JJ Vallow and Tylee Ryan. But before they go before a judge and jury, a three-part Netflix documentary, “Sins of Our Mother,” airs beginning next week — leading some to wonder if the series could hamper efforts to seat a fair and impartial jury.