After Navy electrician Michael Jacobs comes home to find his wife, Suzanne, and his 3-year-old son, Colin, murdered, San Diego police race to catch a serial killer who leaves behind an unimaginable calling card.

In Lenexa, Kansas, young women disappear from their apartments as police piece together evidence showing the terrifying crimes are connected.

A young woman is ambushed and murdered in Utah's remote Big Cottonwood Canyon. A cryptic note leaves investigators wondering if her death was just a tragic coincidence or a brutal betrayal.

When the body of a young woman if discovered on a cold winter afternoon in South Carolina, police retrace her final movements to find the killer.

Police race to find a killer after the decapitated body of a talented chef is found near Speedway, Indiana.

A woman's walk home from a Friday night out at a dance club in Lubbock, TX, ends in murder. Her naked body is discovered under a bush right next to a church on Sunday morning. As the investigation unfolds, detectives realize the path to justice relies on following the evidence to an unlikely suspect.

A cold case detective re-opens a decades old murder and promises the young woman's family their long awaited justice.

An offer of help turns deadly when a young woman and her boyfriend find themselves stranded. Investigators are soon on the trail of a ruthless serial killer.

After the lifeless body of a popular teen girl is found lying on the side of the road, police look to her cell phone records to catch her killer.

A college student's courageous battle for survival may be the key to solving a vicious double homicide.

The discovery of a woman's brutally beaten body inside an abandoned trailer is the start of a 28-year search for her killer.

On January 11, 1988, 16-year-old Theresa Burns' brutally murdered body was found by her brother, Stephen, in their home in Mishawaka, IN. The ring of a doorbell overheard during Theresa's final phone call may be the key to solving her murder.

A 12-year-old girl is kidnapped, following a brutal home invasion... Can police find her and her abductor before its too late?

When an 8-year-old girl vanishes on the way home from school, her family and police are sent on a tormenting search for answers. [also marked as S13:E14]

Two women are found stabbed to death three days before Christmas. A third person, a male coworker, is wounded and claims an intruder attacked them. As investigators study the evidence, it looks like the crime scene was staged.

Police try to retrace a young mother's last known movements in a desperate attempt to solve her mysterious disappearance.

When a young woman mysteriously disappears before her final shift at a Maryland hospital, her family begins a decades long search for answers.

A loving mother of three is found mysteriously shot to death just steps from her home. There are few clues at the crime scene beyond a single bullet fragment and two unknown fingerprints. Will they be enough to find the killer?

A 14-year-old girl is killed while walking her dog. When law enforcement analyzes her cell phone, it reveals a series of shocking and heartbreaking clues that ultimately lead investigators straight to her killer.

Police believe there may be a dangerous predator loose on the streets of Stockton, California, and with each attack it appears the perpetrator is growing more violent.

The discovery of a beautiful military police officer murdered in her own home sends police on a twisted journey for answers.

When a teenager is found viciously murdered, police must retrace her last steps alive to identify her killer.

An Illinois family suffers a gut-wrenching journey through the justice system after their 10-year-old daughter is found savagely murdered.

A woman suddenly disappears in Minnesota. Her husband claims she was involved with another man, and his theory is backed up by over 250 intimate emails. Investigators question if her online love affair turned deadly. Will a trail of emails lead police to a vicious killer?

A teenage girl is found murdered the night before her college dream is about to begin. The case remains a mystery until another beautiful teen is found dead a few miles away. The investigation leads police to a sadistic predator.

A cool case team reopens the investigation into the murder of 36-year-old mother Linda Robinson who was savagely murdered while her 7-year-old niece is asleep in the next room.

A young woman about to start a Hollywood career mysteriously disappears off Interstate 10.

A young woman is found murdered in a busy mall parking lot. Despite a treasure trove of evidence, detectives reach a crossroads in the investigation that could make solving the case a challenge they never imagined.

Many stories don't end when the jury delivers its verdict. Three amazing cases where the quest for justice rages on.

A teenage girl's abduction and murder leaves a small Kentucky town reeling. The investigation and its resolution shatters the close-knit community and ultimately destroys a loving family.

A hidden clue could be the key to solving the vicious murder of a Massachusetts woman. [also marked as S14:E15]

Police struggle to find a vicious killer despite having DNA evidence and a videotape of the suspect.