Motives & Murders: Cracking the Case

The murder of a pregnant 23-year-old Iowa woman is investigated.

The investigation into who killed an African American teen girl in Cleveland stalls until, decades later, a lucky break points to a suspect.

The investigation into the murder of a 14-year-old girl, who was brutally beaten and set on fire.

The investigation into the murder of a teacher in her Cleveland area home goes cold until investigators learn that a prison inmate claimed to have killed her while talking to his cellmate.

The disappearance of a young woman from an Oregon parking lot is investigated.

The discovery of a woman's body at an Orlando park is investigated.

A man is suspected of murdering his pregnant wife due to a $300,000 life insurance policy.

The investigation into a woman's murder requires 15 years, a deck of playing cards and a lucky break before it can be solved.

Debra Dill's bludgeoned body is discovered next to her car on a September morning in 1973, and it will take nearly two decades to put her killer behind bars.

When the naked blood-soaked body of a young woman is found on the floor of her Orlando apartment, it's up to investigators to find her killer before he strikes again.