Actress Hayden Panettiere was discovered in cardiac arrest before being pronounced dead on Sunday, according to the Greenville County Coroner's Office. The circumstances surrounding her death have prompted the involvement of the Drug Enforcement Administration (DEA). Sources indicate the DEA is now assisting with the investigation, though the specific nature of their involvement remains unclear. Authorities have not yet released details regarding the cause of cardiac arrest. This development suggests potential concerns regarding possible drug involvement. Further investigation is underway to determine the factors contributing to Panettiere’s untimely passing. The actress, known for her roles in "Heroes" and "Scream," was 33 years old.