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'Suitcase killer' Heather Mack will remain behind bars in Chicago after waiving her right to a detention hearing as she faces a federal murder conspiracy charge for helping brutally kill her socialite mother, according to a report.

The 26-year-old was released from a Bali prison last month after serving seven years for the gruesome slaying of her mom, Sheila von Wiese-Mack, but is now jailed on new charges after returning to American soil November 3.

She was nabbed on a three-charge federal indictment last week after landing at Chicago O’Hare Airport shortly after being released - three years early - from Denpasar Women's Prison on October 29.

Mack waived her right to a detention hearing Wednesday after pleading not guilty to the charges last week, the Chicago-Tribune reported, which means she’ll remain jailed for now.

Her attorney Brian Claypool did not return DailyMail.com's request for comment.

Heather Mack was released from a Bali prison last month after serving seven years of a 10-year sentence for her role in the brutal beating death of her mom Sheila von Wiese-Mack

Her mother's broken body was discovered stuffed in a suitcase in the parking lot of an upscale St. Regis Bali Resort in August 2014

She and boyfriend Tommy Schaefer - who helped murder von Wiese-Mack - are charged with two counts of conspiring to kill her mother and one count of obstruction of justice.

Schaefer remains imprisoned overseas.

Meantime, Chicago prosecutor Terry Kinney is seeking to obtain Mack’s medical and psychiatric records that allegedly documented previous ‘violent attacks’ on her mother, the outlet said.

Mack's slain, badly-beaten mother was found stuffed in a suitcase in August 2014.

Less than a week after she was freed from a Bali jail, Mack was nabbed on a three-charge federal indictment after landing at Chicago O’Hare Airport on November 3

Mack is seen inside an immigration car, after being released from Kerobokan Prison in Denpasar, Bali, Indonesia. She was released 34 months early for good behavior 

The 62-year-old’s broken body was found inside the trunk of a taxi parked at the upscale St. Regis Bali Resort.

Mack has claimed that she was hiding in a bathroom of the luxury hotel when her boyfriend Schaefer, then 21, bludgeoned von Wiese-Mack to death with a fruit bowl.

But prosecutors said she helped him cram the body into a suitcase and wheel it downstairs where they hailed a cab and loaded it into the trunk. The pair ran away when the driver became suspicious but were arrested shortly afterward at a nearby budget hotel and put on trial.

A federal grand jury indictment was filed in July 2017 but remained under seal until U.S. authorities caught wind of Mack's imminent return.

A government motion filed November 3 said: 'The United States has learnt that defendant Heather Mack was released from prison in Indonesia on October 29, 2021, and plans to return to Chicago, Illinois on or about November 3, 2021.

'An arrest warrant has been issued for Heather Mack based upon the Indictment and the FBI intends to execute the warrant when the defendant arrives at O'Hare Airport.'

Heather Mack and Tommy Schaefer were in Bali when they murdered Heather's mother Sheila von Wiese-Mack in a hotel room 

Sheila von Wiese-Mack, 62, was a millionaire socialite from Chicago

The order asked the U.S. District Court for Northern Illinois to unseal the historic indictment immediately upon Mack's arrest.

Mack made a brief appearance last week at the federal courthouse in downtown Chicago where she pleaded not guilty to conspiracy to commit murder in a foreign country and obstruction of justice.

The indictment - which was resealed - includes a list of 'overt acts' by Mack and Schaefer allegedly conspiring to kill her mother, such as Mack arranging her boyfriend's travel to Bali on August 10, 2014, and the couple discussing how and when to kill her in messages two days later.

They are accused of obstruction justice by 'destroy[ing], mutilat[ing] and conceal[ing] objects' by stuffing von Wiese-Mack's body into a suitcase and removing it - as well as the 'linens and items of clothing worn during the killing' - from the scene.

Mack was pregnant with Schaefer’s baby when she was initially jailed and gave birth to her daughter in jail.

Mack was pregnant with Schaefer’s baby when she was initially jailed and gave birth to her daughter in jail

Stella was born during Mack's trial and raised in prison with her mother until she was 2 years old and was then handed over to foster parents

The now 6-year-old, Stella, was raised by Mack until she turned 2. The toddler was then placed into the care of foster parents until Mack’s release.

The Chicago native had begged Indonesian officials to let Stella escape her infamy by staying behind in Bali to be raised by foster parent and close friend Oshar Suartama.

But her plea was refused and the pair were reunited before embarking on the grueling 24-hour trip home taking with stops in Jakarta and Seoul before touching down in the U.S., where agents and a government attorney were waiting for her at O'Hare's terminal five.

Mack is pictured shortly after her release from a Bali prison in October

Claypool sought an emergency hearing Tuesday to ensure that, in the event Mack was taken away, her daughter would instead be left in the care of Oshar, who accompanied the mom and daughter on their flight to the U.S.

Claypool told DailyMail.com that he applied to Cook County for the emergency order after hearing that FBI agents boarded the same flights and shadowed the trio as they traveled halfway around the world, though his claim is yet to be confirmed.

'We didn't want Stella going into CPS [Child Protective Services],' Claypool told DailyMail.com.

'First, she has a foster mom, who she considers to be mommy number two. They have a loving, caring relationship. Second, once a child gets into the foster care system it is a lot harder to extricate them.'

Mack was pregnant at the time of the murder and delivered her daughter, Stella (pictured together, left), in prison. Mack's then-boyfriend Tommy Schaefer (pictured holding Stella, right), who is also the father of her child, is serving an 18-year sentence for murder 

Claypool said that if the feds decide to arrest Mack on new charges - perhaps some sort of conspiracy charge related to the plotting of her mother's death, rather than the act itself - he would fight any such charges on the basis of double jeopardy.

'It's gonna be a dog fight because they are being punitive towards Heather,' he told the Chicago-Sun Times.

Among those at international arrivals awaiting a glimpse of Stella was Schaefer's mom Kia Walker, who told reporters she planned to fight for custody of the little girl.

'I'm Stella's grandmother and I want custody of my granddaughter,' she said, fighting tears.