Jamie Spears files petition to investigate Britney Spears' conservatorship treatment

Jamie Spears filed a petition on Tuesday to investigate the claims that his daughter Britney Spears raised during her rare testimony last week asking to end her conservatorship.

The singer, 39, has been under the legal conservatorship involving her father for more than 13 years. In a dramatic testimony last Wednesday, Spears alleged that she was overworked without any breaks, medicated with lithium and prohibited from having more children after her conservators did not allow her to remove her birth control device — all of which she said were approved by her father and co-conservator, James "Jamie" Spears.

Related: "I just want my life back," she told a probate judge in Los Angeles on Wednesday.

In his petition filed on Tuesday, Jamie Spears and his team requested the court to "investigate the veracity of the allegations and claims made by Ms. Spears," which he has vehemently denied, saying that he only has his daughter’s best interests at heart.

Her father also filed a response on the same day as the petition, expressing concerns over Jodi Montgomery, who was appointed as Britney Spears' temporary conservator of the person in September 2019.

In his response, Jamie Spears said he was "concerned about the management and care of his daughter" and that Montgomery did "not reflect her wishes." He added that Montgomery was the sole conservator who oversaw the decisions related to the singer's personal life and medical treatment since her appointment.

Attorneys for Britney Spears and her father did not immediately return a request for comment Wednesday about the filings.

Related: Spears spoke to the court about her conservatorship case last week, calling her father and others who've managed her care "threatening" and "abusive."

Jamie Spears was appointed as his daughter's conservator in 2008. He was temporarily made the sole executor of his daughter’s estate in 2019 after his co-conservator, Andrew Wallet, resigned.

A year after Wallet resigned, Britney Spears’ attorney, Samuel D. Ingham III, filed a petition to have Jamie Spears removed. Ingham said his client was afraid of her father, would rather have a professional handle her case and would refuse to perform so long as her father is in charge of her affairs.

Los Angeles County Superior Court Judge Brenda Penny denied the singer’s request but did assign a financial institution, Bessemer Trust, as Jamie Spears’ co-conservator and Montgomery as Britney Spears' conservator of the person.

Britney Spears told a Los Angeles judge that she was not aware she could request to end the conservatorship, alleging that her father has punished her for not complying with his desires and felt like she was "enslaved" by his demands. The singer also expressed privacy concerns about her medical treatment, saying that she was watched at every hour of the day.

Related: The pop singer wrote that she pretended to live a fairy tale life because she was "embarrassed to share what happened" with her conservatorship.

Following her testimony, Spears was inundated with support from actors, singers and media personalities, including her sister, Jamie Lynn Spears, and fellow pop singer, Christina Aguilera. Scrutiny of her case has been heightened in the wake of "Framing Britney Spears," a documentary about her conservatorship released in February, helping to fuel the #FreeBritney movement on social media.

Though much of her life has played out in the public eye, the court has sealed a number of documents from public record because of concerns about the singer’s privacy. Ingham filed a motion last year to open her case to the public.

During her testimony, Spears said, “I just want my life back. It’s been 13 years and it’s enough."

In her closing remarks, she said: “I feel ganged up on, bullied, left out and alone. And I'm tired of feeling alone. I deserve to have the same rights as anybody does, by having a child, a family, any of those things and more so.”

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This story first appeared on NBCNews.com.

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