"The question became not how did he dupe certain people in the community, but how was he able to con this woman that he was married to for 12 years and who was a very bright and successful woman," Lopez said.
McCormack added that despite it all the story really is a love story between Rockefeller and Boss.
"Some people look at this film and think he had her pegged as his meal ticket from the beginning," McCormack said. "And maybe he did, but he also loved her and she him."
Some have wondered why Lifetime chose to cast Eric McCormack who is better known for comedic roles, not to mention that he is much better looking than the Rockefeller imposter, whose real name is Christian Karl Gerhartsreiter.
Lopez has a simple answer: "Women like looking at great men, villain or otherwise."
On a crisp fall day on Oct. 2, 2006, in rural Pennsylvania, a community that tried so hard to be separate was thrust into the media spotlight when a man with a gun entered an Amish schoolhouse. An hour later, five girls were dead, and five were wounded and bleeding.
Lifetime decided to focus on the event from the point of view of two women close to the tragedy. Ida Graber, played by Kimberly Williams-Paisley, depicts a mother who loses her child in the shooting and the other, Amy Roberts, is the shooter's widow, played by Tammy Blanchard. Ida Graber is a composite of multiple mothers who experienced the loss of their children in real life.
After the tragic shooting, most people were surprised that the Amish community forgave the killer, as their faith requires, and some members of the tight-knit group even attended his funeral.
The movie is based on the book "Amish Grace: How Forgiveness Transcended Tragedy," written by three experts on Amish life.
"For us the story was about overcoming the unimaginable," Lifetime's Lopez said. "And that became a talking point for mothers across the country. When I read the book, one of the things that struck me most was that one of the Amish women said she had to do it every day, she had to forgive every day."
"Amish Grace" will premiere Sunday, March 28, at 8 p.m. ET on the Lifetime Movie Network.
Here's a retrospective of Lifetime's best flicks based on true stories.
Sigourney Weaver played Mary Griffith, the mother of Bobby Griffith, a real-life man dealing with being gay in a devoutly Christian household.
The film begins with Bobby questioning his sexuality and eventually coming out to his family. At first, Mary believes that homosexuality is "curable" with prayer. Bobby tries to reconcile his feelings with the church's teachings but quickly spirals into depression. On a warm late August day, Bobby commits suicide by jumping from a freeway overpass in front of an 18-wheeler. Facing the loss of her son, Mary searches for answers and reaches out to the gay community, eventually finding the Parents, Families and Friends of Lesbians and Gays (PFLAG).
The Lifetime movie is based on the lives of Bobby and Mary as told in the book "Prayers for Bobby: A Mother's Coming to Terms with the Suicide of Her Gay Son," written by Leroy Aarons, the founder of the National Lesbian and Gay Journalists Association and former Washington Post reporter.
Lopez said that women can relate to this story because we all deal with internal conflicts at some point in our lives.