"I don't suffocate in my grief," Goldman's sister, Kim, told the AP in an interview. "But every milestone that my kid hits, every milestone that I hit, you know, those are just reminders of what I'm not able to share with my brother and what he is missing out on."
She wonders if Simpson is following conditions of his parole.
"Yeah, I hear he's living the life of Riley out there in Las Vegas, being treated like a king," Goldman said sarcastically. But she added she rarely thinks of him unless someone brings up his name.
Nicole Brown Simpson's sisters, Tanya and Denise, did not respond to email or phone messages.
Ronald Goldman, then 25, was returning a pair of sunglasses that Nicole Brown Simpson's mother had left at a restaurant where he worked when he and O.J. Simpson's ex-wife were stabbed and slashed dozens of times. Simpson's televised trial lasted nearly a year and became a national obsession, fraught with issues of racism, police misconduct, celebrity and domestic violence.
Represented by a legal "Dream Team" that included Johnnie Cochran Jr. and F. Lee Bailey, he was acquitted by a jury in 1995 in a verdict that split the country along racial lines, with many white Americans believing he got away with murder and many black people considering him innocent.
He has continued to declare his innocence. The murder case is officially listed as unsolved.
The victims' families subsequently filed a civil suit against him, and in 1997 he was ordered to pay $33.5 million for the wrongful deaths of the two victims. Some of his property was seized and auctioned, but most of the judgment has not been paid.
He later served nine years in prison for robbery and kidnapping over an attempt to steal back some of his sports memorabilia from a Las Vegas hotel room. He insisted his conviction and sentence were unfair but said, "I believe in the legal system and I honored it. I served my time."
For a man who once lived for the spotlight , Simpson has generally kept a low profile since his release from prison in October 2017.
The knees that helped him run to football glory at the University of Southern California and with the NFL's Buffalo Bills have been replaced, and he recently had Lasik surgery on his eyes.
His parole officer has given him permission to take short trips, including to Florida, where his two younger children, Justin and Sydney, have built careers in real estate. His older daughter, Arnelle, lives with him much of the time.
He also visited relatives in Louisiana, he said, and spoke to a group of black judges and prosecutors in New Orleans.
After he got out of prison in Nevada, many expected him to return to Florida, where he had lived for several years. But friends in Las Vegas persuaded him to stay there.
"The town has been good to me," Simpson said. "Everybody I meet seems to be apologizing for what happened to me here."
A month after his release, an outing to a steakhouse and lounge off the Las Vegas Strip ended in a dispute. Simpson was ordered off the property and barred from returning. No such problems have occurred since, and Simpson is among the most sought-after figures in town for selfies with those who encounter him at the restaurants or athletic events he attends occasionally.
But the glamour of his early life is just a memory. After his football career, Simpson became a commercial pitchman, actor and football commentator. Once a multimillionaire, most of his fortune was spent defending himself from the murder charges.
Simpson declined to discuss his finances other than to say he lives on pensions.
To coincide with Wednesday's anniversary, Kim Goldman will launch a 10-week podcast, "Confronting: O.J. Simpson," in which she will interview her brother's friends, the detective who investigated the killings, attorneys for the defense and prosecution, and two of the 12 jurors who acquitted Simpson.
She will continue to make the case that Simpson was guilty.
Linda Deutsch is a retired special correspondent for The Associated Press. She covered all of Simpson's legal cases during her 48-year career as a Los Angeles-based trial reporter. Associated Press writer John Rogers contributed to this story.