The investigation surrounding Hayden Panettiere’s death has taken another unexpected turn.

Federal agents reportedly entered the actress’ West Hollywood residence on Tuesday, August 25 — more than a week after the Nashville and Heroes star died at age 36.

According to Us Weekly, a witness inside the building said more than six federal agents entered Panettiere’s residence and had a warrant to search the premises.

Exactly what investigators were searching for — and whether anything was removed from the home — has not been publicly disclosed.

The development comes as authorities continue trying to establish exactly what happened before Panettiere was found unresponsive at a residence in Greenville, South Carolina, on August 16.

An initial autopsy found no signs of trauma, but an official cause of death has not yet been announced. Toxicology testing is still pending.

The investigation has also expanded beyond local authorities.

ABC News reported that the Drug Enforcement Administration joined the investigation, with Greenville police remaining the lead agency.

However, there is an important distinction.

Although witnesses reportedly described federal agents searching Panettiere’s California residence, authorities have not publicly confirmed which federal agency carried out that search. Entertainment Weekly reported that the FBI’s Los Angeles office said it was not aware of an FBI search at the address.

That leaves several significant questions unanswered.

Why was a warrant issued for Panettiere’s California residence?

What were investigators looking for?

And is the reported search connected directly to the DEA’s involvement in the wider investigation?

For now, authorities have not provided those answers.

Police records previously confirmed that Panettiere’s on-again, off-again boyfriend Brian Hickerson and his brother Zach were at the South Carolina residence when she was found unresponsive.

No arrests or criminal charges connected to Panettiere’s death have been announced.

Her representatives have also urged people not to turn unanswered questions into accusations while investigators continue their work.

That distinction matters.

A search warrant allows authorities to search for evidence described in the warrant. It does not by itself establish that a crime occurred or that any particular person committed one.

For fans who watched Panettiere grow from a child actress into memorable roles in Heroes, Nashville and films including Remember the Titans, the latest development adds another unanswered chapter to an already heartbreaking story.

Until toxicology results and additional findings are released, much about the circumstances surrounding her death remains unknown.

And now, following the reported search of her California home, attention will remain focused on what investigators learn next.