A successful lawyer, Mormon family man, and father of five is shot down in cold blood at a Walgreens parking lot, but a closer look reveals a dirty office affair that turned into a dangerous game of Russian roulette.

Tattoo shop owner Dennis Abrahamsen is found brutally murdered and naked on a massage table in his home; evidence tells a story of a wild sex party gone wrong with a famous adult actress.

Mother of two Crystal McDowell vanishes as Hurricane Harvey rocks Houston; surveillance video leads investigators to her twisted killer.

Former model, Samira Frasch, was living a life of extravagance until tragedy struck; the mother of two is found dead at the bottom of her swimming pool and both her children are missing from the home.

Aspiring cosmetologist Shannon Graves is found dismembered inside a padlocked freezer but when another woman is spotted driving her car and going into her apartment, detectives discover a chilling cover-up.

Successful doctor and mom of two, Teresa Sievers, is found bludgeoned to death in her kitchen after returning home from a family vacation.

The bodies of two young women found dead in suitcases on the side of the road lead investigators to a former cop with a double life and a stunning confession.

A 41-year-old mother of three was brutally stabbed nearly 200 times in front of her two youngest children; investigators reveal a sick and twisted motive behind the deadly rampage, and her daughter who witnessed the attack speaks for the first time.

Newlywed Lauren Phelps is stabbed 123 times as she fights for her life; her killer may blame his deadly rampage on cold medicine.

After Florida mother Gretchen Anthony, 51, goes missing from her home, surveillance video tells a twisted tale of her final hours.

A romantic and scenic early morning boat ride turns deadly when Larry Isenberg falls overboard; investigators reveal the disappearance of half a million dollars, which could be motive for murder.

24-year-old Alex Woodworth is brutally stabbed 16 times and left for dead hanging halfway out of the killer's car; as investigators peel back the layers, it's revealed the killer's many lovers is motive for murder.

A routine purchase may lead police to the killer of Laura Ackerson, a young mother whose body parts surface in an alligator-infested creek 1,200 miles away from where she was last seen.

Police find Jenny Webb hanging in an apparent suicide just days from giving birth to her first child; when things don't add up, investigators wonder if an unraveling love triangle and an unexpected pregnancy acted as a motive for murder.

An 8-year-old girl discovers her mother brutally bludgeoned to death in her home after her mom’s shift at a Vegas casino; police turn to surveillance video hoping to reveal the killers.

A killer stabs devoted father Jeff Wright 193 times and buries him in the backyard of his own home; investigators examine his background and their quest to find the culprit.

A desperate wife dials 911 to report a robbery after finding her husband, a father of three, shot in bed; evidence at the scene quickly leads investigators to the killer.

The brutal and public stabbing of a young high school teen shocks the community, and police quickly unravel the crime and motive through threatening voicemails and a long-simmering rivalry.