Motives & Murders: Cracking the Case

- Season 4

(2013)

A beautiful young violinist is murdered at the venerable Metropolitan Opera House in Manhattan and the story becomes an international scandal. Police interview everyone behind the scenes and the search is on for the real Â'Phantom of the Opera.'

With a thriving business and a baby on the way, a Florida couple is strangled to death in their home. Suspicions about drug smuggling and an aviation deal gone wrong lead detectives to Belize, but are they looking in the right direction?

Fourteen-year-old Karen Slattery is brutally stabbed and raped while babysitting in South Florida's upscale Delray Beach. Police follow up on dozens of tips but the case goes cold. That is until a nearly identical crime strikes terror in nearby Boca Rato.

A woman's body is dumped alongside a road near Tampa, Florida. And within a year, the bodies of two more women are found at the side of the road. Detectives fear a serial predator is on the loose, but the search for the killer will take years.

In Boston, 18-year-old Amy Roman is found slaughtered in her South End apartment. Police believe the victim knew her assailant. But when the case goes cold, her determined family undertakes an investigation of their own.

A pillar of the Haitian community in Spring Valley, New York, is gunned down in his driveway, and the suspects include the victim's terminally ill wealthy second wife, his alleged mistress, and her gun-toting ex-husband.

When John and Nancy Bosco are shot at close range in their Bigfork, Montana home, the search is on for a cold-blooded killer. But with few clues and no suspects the case stalls. And John's mother eventually turns to an unorthodox source for help.

Bob Henry is gunned down in broad daylight outside the Tacoma, Washington warehouse where he works. The execution-style murder looks like a professional hit. But to solve the crime, police need to find the murder weapon.

Kathleen Smith is bludgeoned to death and her Tempe, Arizona home is then set on fire. Investigators have two suspects but no hard evdence to tie either to the murder. And it will take 15 years before a jailhouse tip finally leads cops to the killer.

A glamorous flight attendant disappears and the story makes headlines. An intense search reveals few clues. But a graveside discovery eventually forces police to take a second look at some already familiar faces.