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.

A mystery looms over a small New York town when a woman is murdered and a stunning secret is exposed; more than a decade later, new developments lead to an unexpected conclusion.