Dateline: Unforgettable

A 49-year-old man is shot and killed while walking his dog in front of his Texas home.

The body of an Ohio woman is found in a wooded area near her home months after she went missing.

A college student is found stabbed to death in her bedroom; Blayne Alexander revisits this case.

When 17-year-old Alissa Turney disappears, it takes years before her case is treated as a homicide.

Detectives investigating the murder of Molly Matheson uncover a trail of sexual assault crimes.

Authorities take two years and three trials to solve the shooting death of the wife of an FBI agent.

Chantay Blankinship's remains are found at a rundown building that locals call the Haunted House.

Investigators discover a silent witness that cracks the case wide open.

The parents of Kristin Smart speak out following the sentencing of their daughter's killer.

Investigators uncover security camera footage that could be key to solving the murder of a nurse.

A woman vanishes; determined to track her down, her family takes matters into their own hands.

A former ballerina shoots her husband in what she alleges was an act of self-defense.