The Menendez brothers were found guilty of the murders of their parents in 1996, whom they claim were abusive. In this episode of 20/20, Lyle Menendez speaks, and we explore their popularity on social media app TikTok.

We bring you an investigation into the past of Lori Vallow, whom authorities arrested in Hawaii following the disappearance of her two children, charging her with desertion and non-support of dependent children.

In a new interview with 20/20, Scott Falater, whose sleepwalking defense made international headlines in the 90s, says he still doesn't know what happened the night he murdered his wife.