There are still many more questions surrounding the death of Hayden Panettiere.

Authorities continue to investigate the shocking death of the actress – best known for roles in “Nashville,” “Heroes,” “Ice Princess,” and “Bring It On” – who was found unresponsive at Judson Mill Lofts, an apartment complex in Greenville, South Carolina, local police told USA TODAY.

A 911 call obtained by Reuters, TMZ and other outlets revealed the “Scream” franchise actress was in cardiac arrest after a possible overdose.

Here’s what we know as her family and costars speak out and the investigation moves forward.

Welfare check made at Brian Hickerson family home: Report

Greenville, South Carolina police have reportedly responded to a home belonging to Brian Hickerson’s family the morning of Wednesday, Aug. 19. Police told Page Six they were conducting a welfare check, and the outlet witnessed the officers visit the property two times and knock on the front, side and back doors but received no answer.

The officers did not tell the outlet who the welfare check was for.

USA TODAY has reached out to the Greenville Police Department for comment.

Hickerson, Panettiere’s on-and-off boyfriend since 2018, has had a tumultuous relationship with the actress, including allegations of physical abuse that led to jail time for domestic violence.

Hayden Panettiere gets gaming career tribute from ‘Kingdom Hearts’ successor

Panettiere was a frequent film and television star, but she also lent her voice to various projects, including the hit Disney video game franchise “Kingdom Hearts.” The actress provided the English voice of Kairi, the series’ main female character, intermittently from 2002 to 2010.

Fellow former child star Alyson Stoner, who voiced Kairi in games from 2007 to 2020, shared an emotional video in tribute to Panettiere and recalled working with both her and her late brother, Jansen Panettiere.

“From one Kairi to another, I just wanted to acknowledge the tremendous loss, not only for the ‘Kingdom Hearts’family but of course all of the close loved ones and the millions of lives Hayden reached,” she said. “Sending so much love to Hayden’s family. I’ll be thinking of Hayden and the legacy that she has left.”

Panettiere also voiced Dot in two “A Bug’s Life” video games, reprising her role from the film, and had a voice role in “The Mark of Kri.” She also lent her voice and likeness to the interactive horror hit “Until Dawn.”

Mariska Hargitay, Ethan Suplee and Justin Chatwin pay tribute to Hayden Panettiere

Mariska Hargitay, who worked with a young Panettiere on “Law & Order: SVU,” and other former costars shared their tributes to the actress.

Hargitay captioned a shot of herself and Panettiere, from the 2005 episode “Hooked,” and wrote, “Holding you in my heart. Heartbroken about your hard journey. Remembering your light.”

Panettiere also guest-starred in the memorable 2001 episode “Abuse” at 11 years old, as the neglected child of famous parents.

Ethan Suplee, who starred with the young actress in 2000’s “Remember the Titans,” published an essay on his Substack and recalled a then-10-year-old Panettiere jumping into his arms at the premiere, before he ducked off to do drugs in a bathroom.

Regarding her death, and the loss of other stars due to reported overdoses, he wrote, “I feel a tremendous sense of loss today. I don’t know what they were going through at the end. I only know that for them, the battle is over. And I’m sad.”

And Justin Chatwin, who met Panettiere while she was on “Heroes” before working with her on one of her final films, “Sleepwalker,” said she seemed isolated during filming in late 2025.

“I could tell she was struggling, and I was like, ‘I don’t think it’s this movie,'” he told People magazine. “There’s a handful of women that I’ve worked with that I really liked, and I really loved working with her, but I also know that she was really lonely.”

Hayden Panettiere’s mom statement: Family was ‘trying to get rid of’ boyfriend Brian Hickerson

Panettiere’s estranged mother, Lesley Vogel, told NBC News over the phone on Aug. 18 that the actress’ family did not approve of her rekindled relationship with Brian Hickerson.

“This person in her life that we have been trying to get rid of for quite some time was with her at her death and that was Brian Hickerson,” Vogel told the outlet.

She added, “I think Hayden was an amazingly talented person in so many departments and I think young people who grow up in the entertainment industry – it is a struggle and it’s a very challenging industry, and it’s not unusual for them to sadly find the wrong path.”

Vogel was her daughter’s manager from when she was a baby until Panettiere ended their working relationship at 19 – a decision that led to their strained relationship, the actress shared in interviews and her 2026 memoir, “This Is Me: A Reckoning.”

According to a police report obtained by USA TODAY, Hickerson and his brother, Zach Hickerson, were on the scene and called 911.

Hayden Panettiere’s ex Brian Hickerson, his brother Zach were with her when she died

The officer reported first speaking with Zach Hickerson, who told the police officer that Panettiere “was his brother’s girlfriend.” He was “very emotional” as emergency medical personnel attempted to save Panettiere, while Brian “did not become emotional” until medics declared the actress dead, according to the officer’s report.

Brian Hickerson also showed police a “bag of medication” the actress was allegedly taking at the time. Other details in the report were redacted.

Hayden Panettiere cause of death: How did she die?

A cause of death has not yet been shared.

On Aug. 16, at about 1:51 p.m., police officers and emergency medical personnel responded to a call from an acquaintance of Panettiere’s reporting an unresponsive woman at an apartment complex in Greenville, South Carolina, police confirmed to USA TODAY on Aug. 17.

Medical assistance was administered upon arrival, but the woman, later identified as Panettiere, was pronounced dead, according to police. They added that no foul play is suspected.

Hayden Panettiere toxicology report: When will her cause of death be released?

Panettiere’s cause of death is pending, with the Greenville County Coroner’s Office telling USA TODAY on Aug. 17 that it could take up to three months for her autopsy and toxicology reports to be completed. USA TODAY has requested a copy of the coroner’s report when it is finished.

On Aug. 18, a rep for the Greenville County Coroner’s Office told TMZ that Panettiere’s body was ready to be released to family.

Who is Hayden Panettiere?

The actress, whose prolific career in TV and film began when she was a baby, got her big breakout role as cheerleader-turned-superhero Claire Bennet on NBC’s “Heroes” after roles in “Remember the Titans,” “Ally McBeal” and Disney’s “Ice Princess,” later starring as country-pop singer Juliette Barnes in more than 100 episodes of “Nashville.”

Panettiere’s father, Skip Panettiere, confirmed his daughter’s death in a statement to USA TODAY shared by her representative.

He remembered the actress as “an incredible light and a force of nature who brought immeasurable love and joy to all who knew her – and to the millions who watched her onscreen.”

If you or someone you know is struggling or in crisis, you can call the Substance Abuse and Mental Health Services Administration Helpline at 1-800-662-HELP (4357).

Contributing: Sameen Chaudhry, Anika Reed and KiMi Robinson, USA TODAY; Terry Benjamin II, USA TODAY Network