After more than 20 years, the real killer of Idaho teen Angie Dodge is caught; a chilling twist in the story of Chris Tapp who had been wrongfully convicted in the case. Keith Morrison reports.

The investigation into the mysterious disappearance of a Canadian man sparks an international manhunt for an elusive killer with multiple false identities.

A mother searches for answers in the unsolved murder of her 14-year-old daughter until new DNA technology changes everything.

When deadly gunfire erupts in an Austin, Texas, home in the middle of the night, detectives wonder if the homeowners' jewelry business is a possible motive; an investigation uncovers a suspect that no one saw coming.

A small Texas town is shattered when beloved teacher Manuela Allen vanishes from her home in the middle of the night. When a gruesome discovery is made a short time later at a local lake, investigators are left with more questions than answers.

New details on the latest twist in the murder-for-hire plot involving a prominent Florida family that left law professor Dan Markel dead and a grandmother arrested.

An investigation into the murders of several women found dead along Gilgo Beach in Long Island, N.Y.

A woman goes missing and investigators uncover her husband's chilling history including dark secrets about another missing wife.

Josh Mankiewicz reports on the fatal shooting of Jamie Faith, who was brazenly gunned down while he and his wife were taking their dog for her morning walk outside their Dallas home.

When high school student Megan Nichols vanishes from her Illinois home, her mother finds a note saying that she ran away; a grisly discovery made three years later changes the course of the investigation.

When the body of an Ohio woman is found in a wooded area near her home months after she went missing, investigators must determine if her death was a suicide or homicide.

The murders of two young women near a Phoenix canal remain unsolved for over 20 years until a team of cold case detectives take on the case and investigate a man known as the Zombie Hunter.

After a nurse and mother-of-three is murdered inside her Illinois home, investigators uncover security camera footage that could be key to solving the case.

When 17-year-old Alissa Turney is reported missing in Phoenix, it takes years before detectives treat her case as a homicide; a new investigation unearths dark family secrets.

After trumpet player Scott Sessions fails to show up for a scheduled gig, his family learns his body was abandoned in the remote Colorado Rockies; as the investigation narrows in on two suspects, a second murder catches police by surprise.

Law enforcement investigates possible motives after a package explodes at a Southern California day spa, leaving a beloved esthetician dead.

After a 25-year-old mother is gunned down in broad daylight by a murderer wearing a disguise, detectives confront a most unlikely suspect. Dennis Murphy reports.

The separate murders of two women in Toronto ignite an investigation that spans four decades, taking detectives from the big city to a remote, northern town.

A group of women help bring down a smooth-talking serial predator turned killer who lured young women with promises of fame and fortune.

When 16-year-old Britney Ujlaky disappears, a small town in Nevada bands together to track down a potential suspect - an unknown cowboy; Soon, their focus turns to someone much closer to Britney.

Navy petty officer and devoted mother Sherri Malarik is found shot to death in her minivan after she disappeared. The case remains cold until new revelations and old memories resurface, dividing the Florida family.

A series of mysterious events haunt 16-year-old Cassie Jo Stoddart while housesitting, and days later, she's found stabbed to death; police retrace her last day and uncover a stockpile of evidence pointing right to her killers.

When Joy Hibbs is found dead in a fire, an autopsy shows she was murdered beforehand. The case went cold for years, until decades later, a shocking secret is revealed. Blayne Alexander reports.

In Southern California, initial signs point to an accidental fall down a staircase as the cause of Susann Sills's death in 2016. Does the evidence disprove her husband's story?

A family is rocked when a fatal accident reveals itself to be something much more disturbing.