Convicted sex trafficker Ghislaine Maxwell has claimed the disgraced late US financier Jeffrey Epstein was murdered in prison, in an interview with a British broadcaster that aired on Monday.

The Oxford-educated daughter of the late British press baron Robert Maxwell is imprisoned in a Florida penitentiary after her conviction and 20-year sentence for helping Epstein sexually abuse girls.

Epstein, who was facing charges of trafficking underage girls for sex, escaped trial by killing himself in a New York jail in August 2019.

The autopsy concluded suicide by hanging, although the 66-year-old's sudden death fueled widespread controversy and conspiracy theories.

"I believe that he was murdered," former socialite Maxwell said in the series of jailhouse interviews aired on Britain's TalkTV. "I was shocked. Then I wondered how it had happened."

A forensic pathologist hired by Epstein's brother said in 2019 that evidence suggested he had been murdered, arguing multiple fractures found in his neck were "very unusual for suicide".

The US Department of Justice has conducted a years-long investigation into how Epstein was able to hang himself inside New York's Metropolitan Correctional Center, but has not released any evidence of foul play.

Two prison guards on duty who admitted to falsifying records related to the night he died were charged later in 2019 over their alleged failure to monitor him.

But federal prosecutors dismissed the charges in late 2021 after the pair completed community service work as part of an earlier legal agreement.

'Closure'

Maxwell, who is appealing her 2021 conviction for sex trafficking minors, also insisted she now regrets ever meeting Epstein.

She said she did not know "he was so awful" when they first met and began a relationship in the late 1990s.

US prosecutors successfully proved during Maxwell's high-profile trial in New York that she was "the key" to his scheme of enticing young girls to give him massages, during which he would sexually abuse them.

She expressed sympathy for the victims during a court statement, saying she was "sorry for the pain that you experienced" but blamed Epstein.

Maxwell opted against apologizing to the victims during her TalkTV interviews when given the opportunity.

"Epstein has died and they should take their disappointment and upset out on the authorities that allowed that to happen," she replied.

"I hope that they have some closure via the judicial process that took place.

"And I wish them... to be able to have a productive and good life going forward."

'Fake' photograph

In interview excerpts released Sunday, Maxwell also claimed that a decades-old photograph of Prince Andrew with his sexual abuse accuser Virginia Giuffre is "fake".

Giuffre has said she was trafficked by Epstein and Maxwell to, among others, Andrew, King Charles III's younger brother.

The 39-year-old sued the discredited royal in a US court, claiming they had sex in London when she was 17 and a minor under US law.

He settled the sexual assault lawsuit at considerable cost last year, sparing him the public humiliation of a trial.

The prince, 62, has not been criminally charged and has continued to deny the accusations.

The photograph of Andrew with his arm around Giuffre's waist and Maxwell standing next to them -- said to have been taken in London in 2001 -- is seen as crucial to the claim against the prince.

© Agence France-Presse