To most people, teenage sweethearts Steven and Michelle Gibson seem to be happily married. They have four children and live a fun and adventurous life together, but the couple is harboring a dark secret -- one that will tear the family apart.

In Winona, MO, Jason and Stephanie McClurg suffer a series of misfortunes putting their marriage under an enormous amount of pressure, then first responders find Stephanie dead in the couple's trailer.

Dr. Mark Wangler and his wife, Kathy, appear to be living the American dream, then a cold premeditated execution tears their family apart.

Chris and Theresa Lockhart seem like a perfectly matched married couple. But when Theresa vanishes in May 2017, it leads to five months of hell for everyone and a final, shocking act that reveals all.

In January 2003, Curt and Donna Thorngren's 22-year marriage ends in murder. Detectives discover their marriage was destroyed by debt, deceit, and drug addiction.

Byron and Michele Wright overcome broken homes to find solace in one another. But when their blissful union falls apart and a new man arrives on the scene, it unearths violent secrets and a shocking truth.

Matt and Niqué Leili's love story is a modern romance. They meet online, create a blended family and appear to have it all, then their seemingly happy marriage is torn apart forever.

Free-spirited Hope follows her heart to Oklahoma to marry Jerry Meek, but it's not long before children come along, and the honeymoon is over. On Feb. 21, 2002, mysterious events shatter the family and remain unresolved for years.

Cynthia Smith and David Mueller couldn't be more different, but they say opposites attract. When these two meet, there's an instant connection. Then a tragic illness strikes. Will they keep the spark alive, or will they break their sacred marriage vows?

When Manjit Basra and Mukhtiar Panghali settle down and start a family, it seems like a dream come true. But this dream turns into a nightmare, with a heart-breaking ending that leaves everyone questioning what they thought they knew.

When police officer Rob and former beauty queen Joanna reunite years after high school, he seems to be her Prince Charming. But money troubles and infidelities bring this fairytale to a tragic end when one of them is found dead at Devil's Corral.

In Newaygo County, MI, Marty and Glenna Duram are found gunned down in their home. Investigators find evidence of a troubled marriage at the heart of this crime as well as a pet parrot that repeats Marty's last words.

After receiving a call about a car chase, police find a crashed motorcycle and Francis Hall beside her injured husband, Bill Hall Jr., who later dies in the hospital. The investigation into the crash reveals a story of love, infidelity and obsession.

When the bond between twin brothers proves stronger than the one between a husband and wife, true love takes a tragic, deadly turn.

Ashlee and Emmett Corrigan seem to have it all, including true love, five beautiful children and a growing business. However, an explosive encounter blows their lives apart in an instant, revealing their marriage was not what it seemed.

Two lost souls unlucky in love, Frank and Angelina Rodriguez, have found soulmates in each other. But in September 2000, a sudden death leads investigators to uncover a shocking tale of how one person's compulsion can turn into murder.