WARNING! Spoilers ahead for Under the Banner of Heaven's finale.
Under the Banner of Heaven’s ending sees the truth of the Lafferty brothers’ murders explained, leading the main detective to explore the real meaning of unyielding faith. Based on the nonfiction true-crime novel by Jon Krakauer, Under the Banner of Heaven explores the true story of Brenda Lafferty’s murder at the hands of her brothers-in-law Ron and Dan Lafferty. Like the book, the Under the Banner of Heaven series explores the influences of buried Mormon history and dangerous teachings on the brutal murders that were fueled by religious delusions of grandeur.
Throughout Under the Banner of Heaven, Andrew Garfield’s fictional Detective Jeb Pyre is attempting to understand the motivations behind Brenda and her infant daughter Erica’s gruesome murders. He slowly understands the crimes to be based on rhetoric from the early days of Mormonism, a religion he has devoutly followed for his entire life. As Pyre speaks with the rest of the Lafferty brothers and understands the domestic violence, narcissistic delusions, and strict traditional upbringings of Dan and Ron, the detective realizes that Brenda and Erica were just the beginning of their path to disillusioned glory.
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The ending of Under the Banner of Heaven sees Dan and Ron Lafferty apprehended for their crimes as they continue to spout their delusional rhetoric, leaving many of the other characters questioning their own faith. As Jeb Pyre grapples with his personal dilemma to uphold the church’s reputation or reveal the truth of the dangers of the fundamentalist LDS teachings, Under the Banner of Heaven’s main character reevaluates his life’s
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