The investigation into the death of actress Hayden Panettiere has now stretched from South Carolina to Los Angeles, with federal authorities examining where the drugs she may have taken came from.

Panettiere, 36, was found unresponsive and in cardiac arrest at a residence in Greenville, South Carolina, on August 16, 2026. Emergency responders attempted to revive her, but she was pronounced dead at the scene shortly after 2:30 p.m.

More than a month later, authorities still have not publicly released an official cause or manner of death.

The Greenville County Coroner’s Office has said toxicology testing remains pending.

Meanwhile, the Drug Enforcement Administration and local investigators are reportedly examining whether Panettiere obtained illicit or counterfeit pills from a Los Angeles-area supplier before traveling to South Carolina.

FEDERAL INVESTIGATORS ARE LOOKING AT LOS ANGELES
Panettiere lived in Los Angeles, and investigators are now reportedly focusing part of the case there.

According to the Los Angeles Times, DEA agents and local investigators have questioned several people as they attempt to determine where potentially illegal pills came from and whether those substances played a role in Panettiere’s death.

Investigators are reportedly examining the possibility that Panettiere obtained a counterfeit pill that she believed was a legitimate medication.

Counterfeit pills are a particular concern for law enforcement because some illegally manufactured tablets can contain fentanyl or other substances that are not what the buyer expects.

However, that possibility has not been confirmed as the official cause of Panettiere’s death.

THE COUNTERFEIT OXYCODONE THEORY
Reports from sources familiar with the investigation have focused on a theory involving an oxycodone pill that may have been counterfeit.

TMZ subsequently reported that investigators believe Panettiere may have taken an oxycodone pill containing fentanyl.

But the distinction between an investigative theory and an official medical finding is critical.

The Greenville County Coroner’s Office has not announced that fentanyl was responsible for Panettiere’s death. Toxicology results remain outstanding.

Her representative issued a statement on September 16 pushing back against reports based on unnamed sources.

The representative said the investigation remains ongoing and described some recent reports as unverified hearsay, noting that conflicting information continues to circulate.

TEXT MESSAGES ARE NOW REPORTEDLY UNDER SCRUTINY
The investigation took another turn after TMZ reported that Panettiere had exchanged numerous text messages with a person described as an alleged drug supplier.

According to TMZ’s sources, the conversations reportedly included detailed discussions about purchasing black-market pills and continued until shortly before Panettiere’s death.

Investigators are reportedly examining those communications as they attempt to establish where the drugs came from.

The messages could potentially help investigators reconstruct the timeline and identify the source of substances Panettiere may have obtained.

But the full messages have not been publicly released, and the person described in reports as a possible supplier has not been publicly charged in connection with Panettiere’s death.

HER BOYFRIEND PROVIDED A BAG OF MEDICATIONS
Brian Hickerson, Panettiere’s longtime on-and-off boyfriend, was at the residence when she was found unresponsive.

According to a police report, Hickerson showed officers a bag containing medications that Panettiere was taking.

That bag is now potentially important to investigators as they try to establish what substances were in her possession and whether any of them could be connected to her death.

Hickerson has also reportedly spoken with federal investigators.

His attorney has emphasized that Panettiere’s death remains under investigation and has asked that the investigative process be allowed to continue.

The attorney also noted that police have publicly said there were no signs of foul play.

THE INVESTIGATION HAS FOUND NO PUBLICLY REPORTED SIGNS OF FOUL PLAY
The investigation has not publicly identified Panettiere’s death as a homicide.

An initial autopsy found no trauma that contributed to her death, according to the Greenville County Coroner’s Office.

Emergency dispatch recordings reportedly referenced a possible overdose, and Narcan was reportedly administered by first responders.

Nevertheless, those details do not establish the official cause of death.

That determination depends on the complete medical and toxicological investigation.

WHY LOS ANGELES MATTERS
The geographical shift in the investigation is significant.

Panettiere died in South Carolina, but she was a Los Angeles resident and reportedly traveled from California to South Carolina shortly before her death.

Investigators are therefore examining not only what happened inside the Greenville residence, but also what substances she may have obtained before the trip.

ABC News reported that investigators are looking into the possible role of street-level drug dealers and the supply chain behind any drugs that may have contributed to her death.

The investigation therefore potentially involves two separate questions:

What caused Panettiere’s death?

And, if drugs contributed to it:

Where did those drugs come from?

DEA SEARCHED HER LOS ANGELES HOME
Federal involvement became even more apparent after the DEA reportedly obtained a warrant to search Panettiere’s Los Angeles home on August 25 — nine days after her death.

PEOPLE reported that agents were searching for evidence related to possible black-market drugs.

The search suggests investigators were not limiting their work to the South Carolina scene.

They were also examining evidence in California that could potentially help reconstruct Panettiere’s final days and determine what substances she may have possessed before traveling.

INVESTIGATORS HAVE LOOKED AT OTHER PEOPLE AROUND HER
Reports have also focused on people who may have interacted with Panettiere before her death.

TMZ reported that neighbors at her West Hollywood residence recalled seeing several individuals visiting the property over the years.

Some neighbors suspected the visitors could have been drug dealers, although those observations alone do not establish that the individuals supplied Panettiere with drugs.

One reported visitor allegedly appeared with a bag around the time of Panettiere’s final trip.

Investigators would need additional evidence to establish whether any such person actually supplied drugs and whether those drugs were connected to her death.

HER FAMILY AND REPRESENTATIVE ARE ASKING FOR PATIENCE
The latest statements from Panettiere’s representative have emphasized the uncertainty surrounding the investigation.

Rather than confirming the reports about fentanyl or counterfeit oxycodone, her team has urged the public to wait for the official toxicology results.

That caution is particularly important because many of the most dramatic claims currently circulating originate from unnamed sources rather than a publicly released coroner’s report.

Until the toxicology findings are released, it remains impossible to say with certainty what substance, if any, caused or contributed to Panettiere’s death.

THE QUESTIONS INVESTIGATORS STILL NEED TO ANSWER
Several major questions remain open.

Was Panettiere actually given a counterfeit pill?

Did any substance contain fentanyl?

Where did the pills come from?

Who supplied them?

Did the text messages identify a particular supplier?

And will toxicology ultimately confirm or contradict the theories currently being reported?

For now, none of those questions has received an official final answer.

What is established is that Panettiere died in Greenville on August 16, that investigators found no publicly reported signs of foul play, that a bag of medications was provided to police, and that federal authorities are now examining the possible drug supply chain in Los Angeles.

The investigation remains active.

And until the toxicology results are released, the most widely reported theory surrounding the actress’s final hours remains just that — a theory under investigation, not an official cause of death.

SOURCES
PEOPLE — DEA search of Panettiere’s Los Angeles home