Laura Johnson, a mother of five, moves in with her boyfriend in Billings, Mont., then suddenly stops communicating with her family. Her son rushes halfway across the country to learn why and finds disturbing clues that explain how she vanished.

Michael Sandy, an interior designer who recently moved to New York to find a husband, becomes the victim of a hit-and-run accident on a busy highway. Police discover clues that suggest he was targeted for attack.

Julia Jacobson disappears while driving across California on a Labor Day road trip with her beloved pet dog. Police follow her digital footprints to uncover the truth about her final moments, 100 miles off course from her planned destination.

YingYing Zhang, a student at the University of Illinois, misses a campus bus by seconds and then vanishes. As police trace the final moments before she disappeared, they discover a dark secret on campus that takes the case in a shocking direction.

Ashley Young has an active online presence and loves posting on social media. When she suddenly stops communicating with loved ones, her mother launches a search to find out why. A gruesome discovery leads to a tragic answer.

After overcoming a troubled childhood, Brittney Gargol is on a path to a bright future. Shockingly, when the Canadian high school senior is found murdered by the side of a desolate road, a surprising clue leads to an arrest.

A night celebrating Bart Whitaker's college graduation ends in horror when a gunman attacks him and his family, killing his mother, Tricia, and brother Kevin. As police try to unravel the tragedy, they uncover family secrets and a surprising suspect.

A spring break trip to Myrtle Beach, S.C., is irresistible to teenager Brittanee Drexel, despite her mother's opposition. When she disappears from the beach town, it will take years for her family to learn the truth about what happened to her.

Bud and Melanie Billings lovingly adopt a houseful of special-needs kids; when a home robbery ends in Bud and Melanie's murders, police look for clues in the couple's home security camera system and find video that is both horrific and heartbreaking.

Jordie Hudson, a popular artist in St. Augustine, Fla., disappears after a night out at a local bar; as police search for her, they find surveillance videos that include images of a mysterious tattooed man and an unexpected, horrific turn of events.

Ricardo Hibi overcame a tough childhood to become a successful businessman and family man; he opens a group home to give troubled kids the same chance at success; when he's found stabbed to death, police must determine why someone would target him.

When Lindsay Cutshall and Jason Allen are found shot to death on a Northern California beach, police must trace their trail on the camping trip to find clues to their killer.

Jamie Wounded Arrow is proud to be Native American, and part of the LGBTQ community; when police discover her body in her apartment, they search for the man seen nearby on security video at the time of the murder.

Sherry Prather vanishes from a Florida bar and her worried mother spearheads a search for her. When Sherry's body is found by an isolated road, police discover video of Sherry riding off on a motorcycle with an unidentified man.

When Kat West is found dead in the street near her suburban home, police must determine if her death was an accident or a brutal crime; detectives uncover a detail about Kat's life that may have made her a target.

When pawn shop owners Mike and Angie Hockensmith and customer Dan Smith are murdered, the only eyewitness is the owners' 9-year-old son, Andrew; to solve the case, police must look into the lives of preachers and their personal grudges.