Los Angeles medical examiner pushes for greater transparency in high-profile deaths

LOS ANGELES (AP) — Autopsy reports rarely come with barbed comments. So eyebrows rose when the autopsy results of 14-year-old Celeste Rivas Hernandez were released with a statement from the Los Angeles County chief medical examiner saying it was “unfathomable” her grieving parents had to wait months to learn how their daughter died.

The autopsy performed on the dismembered body found in a Tesla in the Hollywood Hills had been sealed by a court order in the investigation that led to murder charges for singer D4vd. Dr. Odey Ukpo's comment with the report was his most pointed effort yet to emphasize his office’s independence from police and prosecutors, as well as his desire to make as much death information public as soon as possible.

D4vd, who has pleaded not guilty, this week faces a crucial preliminary hearing to determine whether there is enough evidence for a trial. Ukpo's agency, which determined Rivas Hernandez died from stab wounds, plays a major role, as it has in other prominent cases, including following the death of “Friends” star Matthew Perry and the killings of director Rob Reiner and his wife, photographer Michele Singer Reiner.

Ukpo, 46, sat for a recent interview with The Associated Press in the building where he performed autopsies for nearly a decade before getting the head role in 2023. He has always welcomed the celebrity cases that Los Angeles brings, saying the scrutiny they receive and the likelihood of misinformation spreading are strong incentives to do careful, irrefutable work. And they provide an opportunity to show what his office does and what kind of dangers the community may face.

“I should be able to anticipate the strongest arguments or the most interesting questions by the work that I’ve done,” he said. “If I haven’t, then something’s missing.”

“Life is complicated, but death is simple,” Ukpo said.

Ukpo doesn't believe sealing autopsy reports helps police investigations, including in the killing of Celeste.

“That goes completely against our mission,” he said. “It’s so important for us to release the information that she did not die from something natural, she did not die from drugs, she was stabbed. And then we start to look back at what made her vulnerable to be in that situation.”

A court-ordered security hold still seals the Reiner autopsies. Authorities said immediately after their deaths that they had been stabbed by their son, who has pleaded not guilty, but little information has followed. Ukpo said he would discuss the findings — if he was allowed.

“The Reiners’ case is one that’s straightforward,” he said. “It’s unclear to me what sort of information we have that would ruin the case.”

Sometimes there is no good reason for secrecy, he said.

“People say: ‘Why would they get the information out there? Because then the case is just going to go awry.’ But awry? How? What information?” he said, adding: “The killer knows what they did.”

The LA County Sheriff’s Department said in a statement that security holds “are rarely requested and are carefully reviewed on a case-by-case basis to determine whether temporarily withholding the autopsy report is necessary to preserve sensitive investigative information.” It said the reports can contain details “that only the person responsible would know,” meaning detectives can use that knowledge to assess the credibility of witness statements and uncover false confessions.

The Los Angeles Police Department, which handled the D4vd and Reiner cases, did not respond to a request for comment, and the district attorney's office declined comment.

Ukpo was appointed chief medical examiner-coroner in 2023, becoming the agency's first Black leader since it was founded in 1850. His staff responds to more than 12,000 sudden, unexpected and premature deaths per year.

The “coroner” part of his title was dropped soon after his appointment and Ukpo supported that change, saying a coroner is usually an elected official — often also the county sheriff — but not a doctor.

“'Coroner' just kind of confused our purpose and suggested that we were within a law enforcement agency,” Ukpo said. “It’s so important to establish our independence.”

Andrew Bernstein, a longtime New York criminal defense attorney who is not involved in any of Ukpo’s cases, said “buddy-buddy” relationships can easily develop between medical examiners and law enforcement.

“They’re dealing with the cops all the time,” he said. “They’re using the same language.”

That relationship can hurt a prosecutor's case, he said, because “jurors pick up on that all the time” and may perceive a testifying medical examiner as biased.

But, Bernstein said, “you don’t want so much independence” that the medical examiner makes decisions regardless of the wants and needs of police and prosecutors.

“You don’t want a rock star chief medical examiner,” he said.

Dr. Michelle A. Jordan, president of the National Association of Medical Examiners, told the AP in an email that the organization supports Ukpo’s “determination to maintain his office’s independence from law enforcement" and the authority of forensic pathologists to “provide transparent postmortem assessments and accurate death investigations” that are “free from undue influence.”

At age 6, Ukpo — who grew up in Anaheim not far from Disneyland — had wanted to be a homicide detective.

But when he met his family physician, he “thought it was really cool how he would work with his hands, do dirty work, work with blood” but “could be very professional in his office, in a suit, in a tie.”

“There you go, that’s the formula for a forensic pathologist,” he said.

Very few medical students want to make autopsies their life's work. He said with a laugh that declaring his intentions “made for interesting medical school interviews.”

His education included stints at Loyola University in Chicago, at the Mayo Clinic in Rochester, Minnesota, and with the medical examiner in Albuquerque, New Mexico.

Ukpo performed autopsies on rapper Mac Miller, actor Tommy Lister Jr., and model and actor Kim Porter, the former longtime partner of Sean “Diddy” Combs.

Perry died within months of Ukpo getting the top job, and his office determined the primary cause of death was acute ketamine toxicity.

“Matthew Perry was really an important one to notify people that ketamine is not harmless,” he said.

He said this and all his work is driven by his desire to first and foremost serve the public.

“What I’m trying to shift during my leadership here is to try to focus on community first,” he said. “Death doesn’t just happen for the family, for the individual. When a death happens, it reverberates.”

FILE - A makeshift memorial for Celeste Rivas Hernandez, whose body was found inside a vehicle owned by singer D4vd, is displayed outside her home in Lake Elsinore, Calif., on April 21, 2026. (AP Photo/Damian Dovarganes, File)

FILE - Matthew Perry poses in New York, Feb. 17, 2015. (Photo by Brian Ach/Invision/AP, File)

FILE - Actor Rob Reiner and his wife, Michele Singer, arrive for an event on Dec. 17, 2013, in New York. (Photo by Evan Agostini/Invision/AP, File)

Los Angeles County medical examiner, Dr. Odey Ukpo, poses for a portrait on Tuesday, June 16, 2026, in Los Angeles. (AP Photo/Jae C. Hong)

Los Angeles County medical examiner, Dr. Odey Ukpo, poses for a portrait on Tuesday, June 16, 2026, in Los Angeles. (AP Photo/Jae C. Hong)

LOS ANGELES (AP) — A judge is set to decide at a hearing that opens Tuesday whether there is enough evidence to put singer D4vd on trial in the killing and dismemberment of a 14-year-old girl that authorities said had threatened to expose their relationship.

Prosecutors have said the evidence will show that 21-year-old D4vd, whose legal name is David Burke, brought Celeste Rivas Hernandez to the Hollywood Hills house he was renting, stabbed her multiple times then cut apart her body in his garage using chain saws.

The preliminary hearing in Los Angeles is expected to last about four days and will look much like an abbreviated trial. There is no jury. Judge Charlaine Olmedo will decide whether the prosecution offered enough evidence to demonstrate probable cause to proceed to trial.

It will be the first public presentation of evidence against Burke, who was arrested in April and pleaded not guilty to murder, continuous sexual abuse of a child under the age of 14 and unlawful mutilation of human remains. His attorney, Blair Berk, has said Burke is not responsible for Rivas Hernandez's death.

The defendant, who has been held without bail in a jail near the courthouse since his arrest, will appear in court in his jail clothes, after the judge rejected a request that he be able to wear a suit as is usually allowed at a jury trial. No cameras will be allowed in the courtroom.

Soon after his arrest, prosecutors filed a memo, which the defense unsuccessfully tried to have sealed, outlining what their evidence would show at this hearing.

The filing said Burke met Rivas Hernandez when she was 11, began sexually abusing her when she was 13 and he was 18, and killed her when she threatened to report him.

She was reported missing multiple times in the years before her death, and prosecutors said they have evidence she was with Burke for long stretches, including a trip to Texas where she met his family. Detectives had contacted him about her, but authorities say he lied and said he had only met her once and didn't know she was a minor. Prosecutors said they have sexual text messages and photos the two exchanged.

A court filing said he sent a car to pick her up on the night of April 23, 2025, from her hometown of Lake Elsinore, California, some 80 miles (129 km) outside of Los Angeles. The two exchanged messages until she arrived at his Hollywood home, after which her phone went dead.

“Knowing he had to silence the victim before she ruined his music career as she had threatened, very soon after her arrival at his home, defendant stabbed the victim to death multiple times and stood by while she bled out,” the document said.

Prosecutors said they have records showing Burke ordered chain saws and wading pools that he used to dismember her body in his garage, and that her DNA was found there on blood stains discovered when police served a search warrant.

They said he then drove around for months with the body in the trunk. About four months after her death, her decomposing body was found in the Tesla registered to Burke that had been towed from the Hollywood Hills in September.

Prosecutors said the car was parked around the corner from his house, and surveillance video will show he was the last person to drive it.

It's not entirely clear why it took seven more months to arrest Burke — though uncooperative witnesses had to be subpoenaed and the final autopsy report showing she was stabbed was not released until December.

The defense has not publicly provided its version of events.

Preliminary hearings like this one serve a similar function to that of grand jury proceedings. Prosecutors generally present only as much evidence as they think they need to, and witnesses are kept to a minimum — mostly police and other investigators. For defense attorneys, it can provide ways to explore potential weaknesses in witness testimony that they can exploit at a trial.

D4vd began making music for YouTube he created of the video game Fortnite when he was a teenager.

The songs he wrote and recorded on his phone were a blend of indie rock, R&B and lo-fi pop. The music made him a phenomenon on TikTok, Instagram, Soundcloud and Spotify, where his top songs, including his 2022 breakthrough “Romantic Homicide,” have more than a billion plays. In 2023, he released two EPs and opened for SZA on tour.

He performed at last year's Coachella music festival just a few weeks before prosecutors said Rivas Hernandez was killed, and his album was released. Five months later, he was on tour promoting it in when the body was discovered.

Los Angeles County District Attorney Nathan Hochman speaks to reporters in Los Angeles Tuesday, July 21, 2026, regarding the case of David Anthony Burke, known as D4vd, who was charged with killing a 14-year-old girl whose dismembered body was found in his car. (AP Photo/Jae C. Hong)

In this courtroom sketch, David Anthony Burke, who is known as D4vd, is seen in court Tuesday, July 21, 2026, in Los Angeles. (Bill Robles via AP)

FILE - D4vd appears at Variety's Power of Young Hollywood in Los Angeles on Aug. 8, 2024. (Photo by Jordan Strauss/Invision/AP, File)

FILE - David Anthony Burke, whose stage name is D4vd, is arraigned in Los Angeles, April 20, 2026, on charges of killing a 14-year-old girl whose dismembered body was found in his car. (Ted Soqui/Pool Photo via AP, File)

FILE - A makeshift Memorial for Celeste Rivas Hernandez, who was killed and found inside a vehicle owned by singer D4vd, is placed outside her home in Lake Elsinore, Calif., on April 21, 2026. (AP Photo/Damian Dovarganes, file)

FILE - A makeshift memorial for Celeste Rivas Hernandez, whose body was found inside a vehicle owned by singer D4vd, is displayed outside her home in Lake Elsinore, Calif., on April 21, 2026. (AP Photo/Damian Dovarganes, File)