A Georgia man suffers 17 stab wounds while on a hunting trip, and authorities rule his death a suicide, shocking his family. Another man disappears without warning -- the only clue is his burned-out car, found 14 hours from where anyone saw him last.

A man's trip ends badly. A missing mom's search party sparks suspicion.

One mom is missing and another spurs a manhunt for her daughter's killer.

Oakley Carlson is missing and no one can find her, including her foster parents and her biological parents; a young mother leaves a bar with a man she doesn't know and ends up dead.

A truck driver finds an unconscious woman on a Missouri motorway, and police determine the suspect attacked her elsewhere and placed her on the road; an unknown killer bludgeons a mum and her daughters at home while her son and nephew cling to life.

The murder of billionaire couple Barry and Honey Sherman in their mansion stuns Toronto, since Barry is a pharmaceutical mogul with many enemies, but it is unclear who would kill his wife; a New York teen disappears after a mysterious road trip.

A 14-year-old disappears in Aruba while on a jet ski ride with an older man; a man kidnaps a young woman from the parking lot of her boyfriend's apartment building.

A girl vanishes on her way home, and an entrepreneur dies after a fight.

A beer entrepreneur is gunned down, and two friends die while on vacation.

A severed foot is an ominous clue in the case of a missing mother of five.

In an ironic twist, a woman vanishes while looking for her missing friend.

A brazen public stabbing and a house fire snuff out the lives of two women.

A war veteran turns up dead, and a missing man leaves a creepy voicemail.

A man relocates only to be stabbed. A student is found dead in her car.

The callously dismembered body of a missing woman turns up in trash bags.

A man and his dog burn to death. A chase ends in murder for a motorist.

Home becomes the most dangerous place on earth for two lovely young women.

Sisters seek justice for their siblings - but the truth might be deadly.

Eighteen-year-old Brookelyn Farthing disappears in 2013 after attending a party in Berea, Ky.; 24-year-old realtor Lindsay Buziak is found brutally killed after showing new clients a million-dollar home.

Thirteen-year-old Abby Williams and 14-year-old Libby German disappear while hiking on a popular trail; 13-year-old Dylan Redwine vanishes over Thanksgiving break while visiting his father in Vallecito, Colo.

Florida insurance agent Carla Stefaniak vanishes in Costa Rica; 19-year-old college student Pravin Varughese disappears after a party in 2014.

After a night out with friends, Jaleayah Davis, 20, is found dead; Kelsie Schelling, 21, drives two hours to show her boyfriend a sonogram of their baby, but never makes it home.

In Mobile, Ala., young mother Danniella Vian, 25, disappears into thin air; 19-year-old Holly Moore's suspicious death still raises questions four years after her body is found hanging in her closet

Their evenings begin as fun celebrations with friends but they end in murder. With disturbing evidence, terrifying theories, and demands for justice, can the mystery of how two young partygoers are murdered be solved?

A young Hollywood celebrity is out celebrating her birthday and another young woman enjoys a late drink with friends, just a few hours later, they both end up dead and investigators try to solve the mystery.