Perfect Family, Perfect Murder? Special 'American Monster' Premieres On ID

Not all people who kill are loners or psychopaths. Sometimes, the most vicious killers are the nice , normal people living next door.

"American Monster" is a new Investigation Discovery series produced by the team behind "See No Evil." The series uses home movies, surveillance videos, 911 calls, police interviews, and courtroom footage to reveal the twisted double lives led by some of the country's most terrifying criminals.

The two-part special premiere episode focuses on the story of April and Michael Holton, teen sweethearts who met at church, and later married and raised three sons in a small Alabama town.

The family appeared to be living the American dream. But in 2016, their world was shattered in the most unimaginable way possible.

April's parents had been frequent drug and alcohol users, and her mother would sometimes take off for periods of time. Because of that, despite being a child herself, April did what she could to help take care of her two younger twin brothers, Chris and Michael. Michael said that April would help with feeding and diapering him and Chris, and Chris called April "the leader of the pack."

For a while, the children lived with their grandparents, Mary Bess and Inos Evans, who managed to get custody of them. But raising three young children proved to be too much for the older couple, and they turned to the Alabama Baptist Childrens Home Association for assistance.

Through the program, the brothers were placed with the Owenby family in the tiny town of Eclectic, Alabama, about two hours away. And when April turned nine, she also went to live with her brothers at the Owenby household.

She thrived in the close-knit community, where everyone knew everyone else.

At age 17, April met Michael Holton, a musician who became the love of her life. The couple married when she was 19 and had three sons.

Michael Holton was a fire fighter and a popular figure in town, and was elected mayor in 2012.

But behind the scenes, trouble was brewing. Holton and his teenage son, Madison, were battling their demons — including issues with drugs.

By 2016, two members of the family would be dead, and a court case would shatter the illusions of small town perfection and divide the community, forever.

Watch the two-part special episode, “Two Families,” of "American Monster" on Sunday, September 8 at 8/7c on Investigation Discovery!