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

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?

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.

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.

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.