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When Nicole Brown Simpson was murdered alongside her friend Ron Goldman on June 12, 1994, her two children were 8 and 5 years old.

After neighbors found the bodies at Brown's Brentwood, California, townhome, police woke the sleeping children and escorted them out the back door to spare them the grisly sight.

Their father, former NFL player O.J. Simpson, was famously arrested for their killings, then acquitted after what many called the "Trial of the Century." More than 100 million people in the United States, alone, watched his televised not-guilty verdict.

Before welcoming Sydney and Justin into the world with Brown, Simpson had three children – Arnelle, Jason and Aaren – with his first wife, Marguerite Whitley. Aaren drowned in the family's swimming pool before her second birthday in 1979.

Simpson died of metastatic prostate cancer at 76 years old this April, Fox News Digital previously reported.

'THE LIFE AND MURDER OF NICOLE BROWN SIMPSON': FAMILY, FRIENDS SHED LIGHT ON INFAMOUS CASE IN NEW DOCUMENTARY

O.J. Simpson, Nicole Brown Simpson, Jason Simpson, Sydney Brooke Simpson, Justin Ryan Simpson

O.J. Simpson, Nicole Brown Simpson, Jason Simpson, Sydney Brooke Simpson, Justin Ryan Simpson pose at the premiere of "Naked Gun 33 1/3: The Final Insult," in which O.J. starred, on March 16, 1994, in Los Angeles. ( Vinnie Zuffante/Getty Images)

With Wednesday marking 30 years since Brown Simpson and Goldman were killed, O.J. Simpson's surviving children are well into adulthood. Since Simpson was granted full custody and moved to Miami, Brown Simpson's family fell out of contact with the four children, her sister, Denise Brown, told filmmakers of Lifetime's "The Life and Murder of Nicole Brown Simpson," released last week in anticipation of the anniversary.

Sydney and Justin's aunt, Dominque Brown, told People in May of this year that Brown Simpson's children "would prefer to just stay low-key and raise their families."

Fox News Digital was unable to reach any of the Simpson children for comment – here's what we know about their lives today.

Arnelle Simpson

Arnelle Simpson, now 55 years old, was born when her football player father was 21 years old, on Dec. 4, 1968. 

Before her stepmother's death, Arnelle "tolerated Nicole," Denise Brown said in the Lifetime documentary. 

"Being a girl, Arnelle was more on the side of [her] mom," the elder Brown sister recalled. "'You broke up my mom and dad,' that kind of thing."

NICOLE BROWN SIMPSON'S SIBLINGS LOOK BACK ON OJ SIMPSON VERDICT: 'I WAS JUST NUMB'

O.J. Simpson and Arnelle Simpson

O.J. Simpson and daughter Arnelle Simpson pose at the Forge restaurant on June 20, 2007, in Miami Beach, Florida. (Alexander Tamargo/Getty Images)

Simpson divorced his first wife Whitley in 1979, two years after he started dating Brown.

Arnelle was an ardent supporter of her father, testifying in his 1995 trial that news of Brown Simpson's death left him "emotional," "out of control" and "distraught." She stated how much her father's family missed him and wanted him to return home.

Later, at Simpson's 2017 parole hearing for a 2007 armed robbery at a Las Vegas hotel, she asked that her father be released. 

"As a family, we recognize he's not the perfect man, but as a man and a father he has done his best to behave in a way that speaks to his overall nature and character," she said, CBS reported.

NICOLE BROWN SIMPSON WAS LIVING IN FEAR OF OJ BEFORE HER MURDER, SISTERS SAY

Arnelle Simpson speaking at O.J. Simpson's 2017 parole hearing in Las Vegas

O.J. Simpson listens as his daughter Arnelle Simpson testifies during his parole hearing at Lovelock Correctional Center, July 20, 2017, in Lovelock, Nevada. (Jason Bean-Pool/Getty Images)

USA Today reported in 2017 that Arnelle Simpson was living in Fresno, California. She was put in charge of her father's NFL pension, interests and assets after his Las Vegas arrest.

She remained close to her father and managed his assets until his death. 

Arnelle Simpson has appeared in several documentaries about her father's trial, including "OJ: Trial of the Century." She told Georgia Newsday that it has been difficult to maintain a career with her family's reputation, but that she worked for a rapper called Hash and produced some fashion shows.

Jason Simpson

O.J. Simpson's second child with Whitley, Jason, was living a private life as a chef at Atlanta restaurant St. Cecilia, the Los Angeles Times reported in 2016. 

Born in 1970, Jason was at his father's side when he was inducted into the Buffalo Bills Wall of Fame in 1980. He was also at the premiere of "Naked Gun 33 1/3: The Final Insult" alongside Brown Simpson and his two half-siblings three months before his stepmom's murder. 

After the infamous police chase where officers tailed Simpson's slow-moving white Bronco, Jason Simpson met with his father at his home in Brentwood. He tried to speak to his father, but was instead handcuffed by police and led back to the house. 

Man in tuxedo walking outside in a garden

O.J. Simpson's son Jason Simpson gets married at Geisa's Tropical Gardens, Miami, Florida. Guests were greeted by Jason at O.J.'s home, and brother Justin and sister Sydney helped with the preparations, May 14, 2005. (Alamy)

The eldest Simpson son has never been implicated in the murders of his stepmother and Ron Goldman. However, private eye William Dear has spent the last 30 years trying to prove that Jason was actually the killer, per reporting by CBS. He published a book on his theory in 2012, which led to the documentary series "Is OJ Innocent? The Missing Evidence."

Sydney Simpson

O.J. Simpson's first child with Brown Simpson, Sydney, was born on Oct. 17, 1985, and was only 8 years old when her mother died. 

In Lifetime's just-aired documentary on Brown Simpson's life, Denise Brown gave a glimpse into Sydney's confusion at the time. 

"One night I was tucking her into bed and we were talking, she said ‘Denise, is my daddy in jail?’ I said yes," the elder Brown sister recalled. "She said, 'Is my daddy going to die?' I said, ‘No, why?’ She said, 'People who kill other people, don't they kill them?' and I said, 'They already said they're not going to do that, Sydney.'"

Sydney Simpson in April 2024

O.J. Simpson's daughter Sydney Simpson is seen running errands on April 20, 2024, in Miami. (MEGA/GC Images)

She and Justin moved with their father to Miami in 2000, six years after their mother's death, when their father was granted full custody.

In 2001, the FBI raided Simpson's home for drugs due to his connection to drug dealer Andrew Anderson, the Tampa Bay Times reported.

Regardless, Sydney graduated from Boston University in 2010 with a sociology degree, according to People, and spent some time in Atlanta before moving to St. Petersburg, Florida. 

There, she bought multiple properties that she rents out and oversees, the Tampa Bay Times reported in April 2016.

Sydney and Justin were photographed in 2016 at the wedding of Denise Brown's son Sean Brown, according to People.

Days after her father died in April and was cremated in Las Vegas, Sydney was spotted by Daily Mail photographers outside her Florida home, carrying a car seat into her apartment.

Details about Sydney's family are unclear; in the Lifetime documentary, Dominque Brown said her sister's children have "their own families" and "children of their own."

"They just want to live normal lives and happy lives," she said. "They don’t have both parents. It’s hard for them. It’s sad. I don’t know if it’s hard, but it’s sad for them. And I think their privacy is important to them."

Justin Ryan Simpson

Born on Aug. 6, 1988, Justin Simpson was just 5 years old when his mother was murdered outside her home as he slept upstairs.

Days after their father's death in April, Justin's godfather, David Brobeck, told People that Brown Simpson's children had found the "good life."

"They've grown up, and they have their own families now, and they're doing really well," he said. "They're solid, solid people and parents, and we just wish them all the best and give them lots of love."

Man in jeans and a polo shirt walks along a paved sidewalk

O.J. Simpson's son Justin Simpson is spotted out and about on the day his father is freed on parole from jail. (Splash)

In 2016, Justin was employed by Coldwell Banker in St. Petersburg as a realtor – he told the Tampa Bay Times that it was "a great place to live." 

"Why not St. Pete?" he told the outlet. "It's gorgeous here."

In February 2022, he announced that he and his wife were expecting a daughter.

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"We are extremely excited, scared, nervous and in love," he wrote. "In only a few short months we will be welcoming little Lana and can’t wait for you to meet her!"