Shelly Miscavige, who was dubbed the 'Queen of Scientology' after her marriage to the religion's leader David Miscavige in 1980, has not been seen in public for more than a decade, and it may remain that way for the foreseeable future, claims her estranged father-in-law.

According to the 9 News, former Church of Scientology supremo Ron Miscavige spoke about his daughter-in-law during an interview with '60 Minutes' this past Sunday, February 10, and revealed it's very likely she's never seen by anyone on the outside ever again. She has been missing since 2005, and some believe she was "banished" by David. 

Finding the Queen of Scientology – who vanished in 2005 – is something of an impossible task. Where is Shelly Miscavige? #60Mins https://t.co/d1yFZPz5Ou

— 60 Minutes Australia (@60Mins) February 10, 2019

Ron, a former member of the church himself, said the fact Shelly has not been seen for 13 years is a reflection of the religion's lack of "conscience." Speaking to Tara Brown on '60 Minutes', he said, "Shelly, she’ll never be free. These are pretty bad people, but they don’t have a conscience and that lets them do it."

Ron joined the Church of Scientology in 1970 and would go on to work in the church's inner core, Sea Org, for 42 years before famously departing in 2012. This fractured his relationship with his son David who had become a confidant to church founder Ron L. Hubbard when he was just 16 and was groomed to become its leader before eventually taking up the highest position following Hubbard's death in 1986.

After leaving, Ron was reportedly put under surveillance by David, who is said to have paid two private investigators to watch him around the clock for 18 months at $10,000 a week. This was because David feared "his father would divulge too much about the organization's activities." At one point, the investigators even phoned David because they thought Ron was having a heart attack but were ordered to not intervene, reported the Los Angeles Times.

But Ron is not the only one who is worried about Shelly's well-being. Also appearing in the documentary is actress Leah Remini, who was a member of the Church of Scientology from childhood before leaving the organization in 2013 and becoming an outspoken activist against it. 

It was reported at the time that one of the reasons Remini — who has released a memoir as well as an Emmy-winning documentary series about her experience in the church — left the church was because she had asked about the whereabouts of Shelly at the 2006 wedding of Tom Cruise and Katie Holmes and was told "profanely" that she lacked the rank to do so.

"You can't just do what you want with a human being," Remini said during her interview. When asked about what she thought had happened to Shelly, the actress said the church's insistence that she was "fine and alive" was "a PR line" which she did not believe.

In August 2013, Remini filed a missing person report with the Los Angeles Police Department concerning Shelly. The police subsequently looked into the matter but later closed the investigation stating her report was "unfounded." The church criticized Remini and said the reports were "harassment" and a "publicity stunt" for her.

They have similarly tried to discredit the upcoming 60 Minutes interview in a blog post titled "Tara Brown Takes a Page From Leah Remini’s Playbook—Stalking Subjects, Staging Scenes and Scamming Her Viewing Audience." They wrote that "Channel Nine and 60 Minutes Australia have turned Tara Brown’s sterile imagination loose on an unsuspecting public" because of a "desire to boost sagging ratings" and that "the whole scene is staged, a fraud on the viewers."