Selena was one of the most celebrated entertainers of her generation, but her life was tragically cut short in 1995 at the age of 23. Now, 30 years after her tragic murder, could her killer be set free? 

This week, "IMPACT x Nightline" reports on the case of Lori Vallow Daybell, a married former beauty queen and mother who fell for Chad Daybell, a religious leader prepping for the end of the world. As the affair unfolded, their families started dying and disappearing, including two of Lori's children, ages 7 and 16, who were killed in 2019.In 2023, Lori was found guilty of two counts of first-degree murder for killing her two youngest children, and now she is back on trial for the alleged murder of her estranged husband, Charles Vallow, but she maintains her innocence.