When a young girl disappears from a quiet suburban street, it marks the beginning of a terrifying game of cat and mouse between police and her abductor.

It takes decades for investigators to follow the evidence to the long-sought-after truth behind the terrifying abduction and murder of 20-year-old Leslie Long, a young mother of three.

After leaving home with a baseball mitt on a sunny afternoon, 14-year-old Barbara Rowan disappears, never to be seen alive again. A neighbor informs the police that she left to speak with her coach, even though she wasn't signed up for a team.

After a young mother goes missing during a Fourth of July weekend, it marks the beginning of a disturbing mystery, one that will devastate a loving family and tear a small community apart.

A young girl's mother reported that her daughter had disappeared while playing outside her mother-in-law's home. Investigators immediately descended on the community, searching cornfields and creeks in the area hoping for clues.

A mother discovers that her young 8-year-old daughter has been abducted from her bedroom in the middle of the night.

Just hours after a popular teenager is reported missing, her lifeless body is discovered under a nearby bridge; police must sort through her puzzling last hours alive to bring a ruthless killer to justice.

After a beautiful young woman vanishes, investigators must sort through a series of puzzling clues to solve a deadly mystery.

A young woman's late-night call from a pay phone is transformed into the scene of a terrifying abduction.

A woman relentlessly investigates her daughter's disappearance leading police to a terrifying string of murders.

Police must retrace a teenager's last known movements if they hope to find out when and where she crossed paths with her killer.

While a predator leaves a trail of destruction in his wake, it may fall to a teenage girl to bring an end to his reign of terror.

While searching for a missing mother, police discover evidence that puts them on the trail of a deadly sexual predator.

When a senior at Ohio State University goes missing, it marks the beginning of a terrifying murder mystery.

A mother arrives home to have lunch with her teenage daughter and walks into a nightmare she will never forget.

After a young mother vanishes, her trail goes cold, then a shocking discovery reveals that history repeats itself.

When a young teacher is murdered in her home, police must rely on the eyewitness testimony of a young neighbor who saw her killer lurking outside her window.

A young mother is strangled to death during her overnight shift at an office building.

A beloved grandmother is savagely murdered during a life-and-death struggle; a family secret may be the key to bringing her heartless killer to justice.

When a hero firefighter is found savagely murdered in his own home, the trail of evidence police find takes them on a twisting 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 four-year-old girl finds her mother's lifeless body, police must try to unravel a puzzling mystery. A murder investigation in which they must rule out multiple solid suspects before they arrive at the unlikely killer.

After two sisters are found murdered, police find evidence painting a grim picture of the heartbreaking double homicide.

When a 16-year-old girl disappears on her way to visit friends, the police retrace her last known movements and uncover a terrifying possibility that she 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. Had the killer managed to destroy all the evidence or was there a clue he overlooked?

When a loving mother is found gunned down just steps from her front door, police in her small town are baffled; as the investigation unfolds their initial confusion will quickly boil over into outrage.

A teenage couple out on a date are ambushed by a gun-wielding madman; the lone survivor's heartbreaking account may hold the key to bringing a cold-blooded killer to justice.

A woman and her teenage daughter are savagely murdered in their own home; police find clues at the crime scene, including 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 personal items belonging to another victim of a violent crime.

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

Two girls take a trip to the mall and never come home; less than 24 hours later they are found shot to death in a desolate field; investigators ask whether they were killed by someone they knew or a notorious serial killer.

Investigators look into the case of an elected community official who is found stabbed to death at his own home in Washington DC.

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

When a young woman is savagely murdered in her own home, police must study the bloody crime scene to find the clue that will lead them to her killer.

A young woman is found bound and strangled to death on the side of a road. As police retrace her final steps, they discover she was last seen being followed by a suspicious man in a cowboy hat.

The murder of a respected health care aide sends a chill through her community. When the investigation reveals several shockingly similar crimes, police realize they've uncovered the trail of a monster.

A tourist takes a photo of vultures in Joshua Tree National Park and inadvertently discovers a gruesome homicide.

When a 15-year-old boy vanished under mysterious circumstances police feared the worst. It appeared the case had terrifying connections to a serial killer who had left a trail of bloodshed across the region.

A 14-year-old girl's mysterious runaway note raises difficult questions for police. Had she really left home on her own or had someone close to her pieced together writing from her journals to cover-up an unthinkable crime.

When a young college student is abducted from her campus parking lot it marks the beginning of a terrifying crime wave on a quiet college campus. Can police catch a serial predator before he strikes again?

After a young girl disappears from her bus stop, a nine-day search reveals that her terrifying abduction has ended in a heartbreaking homicide. As police mount a tireless search to find her killer, the community rallies together to get justice for Angie.

A burned out car and a blood-stained bedroom reveal the chilling murder of a community pillar. Will it be the smallest of clues that lead police to her heartless killer?

A young woman’s disappearance marks the beginning of a heartbreaking murder mystery. Will a clue discovered by a child be the key to catching his mother’s killer?

The abduction of a young mother from a crowded hospital parking lot is the beginning of a terrifying mystery that will torment her loved ones for decades.

When a teenager is found savagely stabbed to death in her home, police hope a trail of blood found at the crime scene will lead them to her killer.

A teenager waiting for her friends to give her a ride home from work suddenly disappears. When her friends arrive, they find terrifying evidence of her abduction.

Police must unravel a puzzling mystery when a beloved father and real estate executive is ambushed in his office.

If investigators can’t find the crack in their suspect’s seemingly air-tight alibi, a cold-blooded killer will elude justice.

After a teenager mysteriously disappears, police must determine if a secret meeting with a young man led to her murder.

After a young woman is viciously murdered, police launch a two-part investigation; one to find her killer and a second to identify his victim, “Precious” Jane Doe.

A young female soldier is found slain after a night out in Colorado Springs, CO. The investigation into her torture, molestation and murder eventually goes cold. It takes decades and advances in DNA processing to finally land her killer and bring him to justice.

Hauntingly Familiar: Investigators must overturn a shocking decision before they can solve the hauntingly familiar murder of a teenager.

Police investigate the gruesome murder of a mother and child, only to realize all the evidence indicates the killer was someone the victims knew and trusted.

A beautiful young woman turns up savagely murdered in a bar parking lot; as investigators retrace her last known steps, several suspects with possible motives come on their radar.

Police wonder if a young woman's personalized license plate, FLRT 12, makes her the target for murder or if a far more sinister plot is behind the crime.

Police find a giant sword bent in half, alongside a victim who has been savagely murdered. Investigators must sort through the details of his complicated life in order bring his killer to justice.

After a loving mother is murdered inside her own home, police focus on their two best clues -- a blood-stained hammer and a dusty footprint.

Veteran journalist Paula Zahn steps out of the studio and into the field to unravel criminal investigations, tracking the drama of each story by featuring the opinions of those closest to the case.

An unidentified woman is found callously murdered in an off-campus apartment; police have no leads on the case until her terrified neighbour shares a chilling story.

The baffling murder of a young woman leads police to two potential suspects: her new boyfriend and an obsessed stalker.

The search for the man who murdered a single mother might lead police to the perpetrator of a second brutal crime with chilling similarities.

A college student disappears, and her family launches a desperate investigation to find her; what they discover changes their lives forever.

A murdered teenager's body mysteriously turns up in the rural Iowa countryside. Will the smallest clue be the key to bringing her killer to justice?

As police try to solve a disturbing homicide, each step of the investigation reveals another layer in a spiderweb of tragedy.

A young mother vanishes, leaving behind nothing but puzzling clues and disturbing questions; a needle in the mud may reveal the truth behind her disappearance.

Paula Zahn talks to investigators, witnesses, victims' families and incarcerated criminals.