When Corey Shaughnessy wakes up to gunfire in the middle of the night, she shoots at the intruder and miraculously survives, only to discover that her husband Ted has been killed. Detectives wonder if the couple's job as local jewelry shop owners could be a possible motive until the investigation takes a turn that no one saw coming. 

INTERVIEWS WITH: Corey Shaughnessy, Nicolas Shaughnessy, Travis County Sheriff's investigators James Moore and Paul Salo, Defense Attorney Rick Flores, family friends Tad Cole and Vicki Frenk, and others.

Navy petty officer and devoted mother Sherri Malarik is found shot to death in her minivan after she disappeared. The case remains cold until new revelations and old memories resurface, dividing the Florida family. In Friday's two-hour Dateline, her grown-up children speak out about the two-decade search for answers.

INTERVIEWS WITH: Tera and Jacob Malarik, Tina and Jeff Leake, Jennifer Spohn, Detective Buddy Nesmith, State Attorney's Office investigator Wayne Wright, Assistant State Attorney Amy Shea, Defense Attorney Chris Crawford, and others.