Hayden Panettiere's shocking cause of death revealed

Hayden Panettiere’s sudden shocking death left many questions behind, with new reports giving more details about what may have happened before she died.

The Heroes star is believed to have taken a pill that may have been oxycodone mixed with fentanyl.

Police are now trying to find where the pill came from.

Reports say Panettiere may have been getting drugs from a person who was selling prescription medicine illegally in Los Angeles for a long time.

She, however, reportedly took a few drugs before flying from Los Angeles to South Carolina.

Investigators are now trying to find out if she took the pill that caused her death on the morning she died.

The final answer will depend on her toxicology results as these tests are expected to show what drugs were in her body when she died.

Fentanyl is a very strong drug. It is also being found in fake pills that are made to look like real painkillers.

A person may not know that a pill contains fentanyl until it is too late.

When Panettiere was found in cardiac arrest her boyfriend Brian Hickerson gave first responders a bag of her prescription medicine.

Doctors tried to save the actress and performed CPR but sadly they could not bring her back.

Police are now working to find the person has supplied the pill.