Sophia Maddox, a 26-year-old filmmaker, has revealed her personal journey of discovering that she is the granddaughter of the notorious criminal Charles Manson in the documentary “My Grandfather Charles Manson,” which premiered on July 22 on Hulu and Disney+. The film offers an intimate exploration of Maddox’s uncovering of her family’s dark legacy and the emotional impact of connecting her own life to one of the most infamous figures in American criminal history.

Maddox first encountered Manson’s name nearly a decade ago as a teenager when researching the Beatles’ song “Helter Skelter.” At the time, she had little understanding of his association with the 1969 murders that shook the nation, including the killing of actress Sharon Tate and others. It was only years later that she learned the devastating truth of her connection to Manson after discovering through a DNA test that her father, Daniel Arguelles, was biologically Manson’s son—a fact unknown to Arguelles for much of his life.

The documentary traces Manson’s turbulent background, featuring archival news footage, interviews, and segments from his 1981 conversation with NBC’s Tom Snyder. It covers the chilling events of August 1969, when Manson directed his followers to carry out brutal killings at Tate’s home and the LaBianca residence in Los Angeles. Manson died in prison in 2017 at age 83.

At the center of the film is Maddox’s complex relationship with her father, who struggled with his newfound identity. Arguelles’s mental health deteriorated as he grappled with the revelation, which also strained his relationship with Maddox. The documentary includes candid moments of conflict, including a confrontation between father and daughter, illustrating a fracture in what was once a close bond.

Maddox said she sought to understand Manson as a person rather than simply a criminal and to explore how the discovery affected her family dynamic. She described the initial emotional turmoil upon learning the truth, including feelings of disempowerment and anxiety, which eventually gave way to a sense of empowerment and healing through therapy and interviews with others connected to Manson’s story.

Co-director Alexandra Orton emphasized the unique challenges of supporting Maddox both as a subject and as a filmmaker during the project’s emotional highs and lows. The documentary team prioritized a compassionate approach, recognizing the difficult personal material Maddox was processing throughout production.

While Maddox has not spoken with her father since their last argument during filming, she maintains an open door for reconciliation and hopes the film conveys a message that individuals are not defined by their lineage. “History is not your destiny,” Maddox said, expressing optimism that people can break free from generational trauma and shape their own futures.

The documentary serves as both a personal reckoning with a troubling inheritance and a broader reflection on how people confront and transcend difficult family histories.