On The Case with Paula Zahn

When a hero firefighter is found savagely murdered in his own home, the trail of evidence takes police on a twisted and tension-filled journey to justice.

When a young girl kidnapped from her bed in the middle of the night is found dead in a nearby canal, it marks the beginning of one of Salt Lake City's most notorious child murder investigations.

After a 4-year-old girl finds her mother's lifeless body, police must try to unravel a puzzling mystery in which they rule out multiple solid suspects before arriving at the unlikely killer.

Two sisters are found murdered in a heartbreaking double homicide. The evidence police discover paint a grim picture of the crime and they hope it will lead them to the killer.

A teenage girl disappears on her way to visit friends. As police retrace her last known movements they uncover a terrifying possibility, the 16-year-old may have been kidnapped by an international human trafficking ring.

Police investigate a residential house fire and discover it was intentionally set to cover-up a savage murder. Investigators work to discover clues the killer may have overlooked.

When a loving mother is found gunned down just steps from her front door, police in her small town are baffled. And as the investigation unfolds, that sense of confusion quickly boils into outrage.

A teenage couple out on a date are ambushed by a gun wielding madman. The heartbreaking account by the lone survivor of the attack could be the key to bringing a cold-blooded killer to justice.

A mother and her teenage daughter are savagely murdered in their own home. Among the only clues police find in the nightmarish crime scene are a bloody bare footprint and an unharmed 3-year-old girl with a heartbreaking story.

When a young woman is found shot to death in her home police are baffled. Then a cryptic letter from a mysterious source sends the investigation down a twisting road to the truth.

A college student disappears in broad daylight after an afternoon of sunbathing at a busy lake. The mystery deepens when her wallet is found along with the personal items of the victim of another violent crime.

When a young woman disappears on a cold night in Breckenridge, Colorado, one of the state's darkest mysteries begins.

Two girls take a trip to the mall and never come home. Fewer than 24 hours later they are found shot to death in a desolate field. Investigators try to determine whether they knew their attacker.

An elected community official is found stabbed to death in his Washington, DC home. Detectives worked to determine whether it was his work protecting his neighborhood or his personal life that led to his murder.

Three terrifying murders are connected by one common thread. After years of frustration and heartbreak, investigators from three states must work together to find the deadly predator responsible for all the crimes.

When a young woman is savagely murdered in her own home, police and her family must find the clue hidden inside the bloodstained crime scene that will lead them to her killer.