Hayden Panettiere's autopsy showed no signs of trauma ... according to the Greenville County Coroner's Office.
The coroner released some details from the autopsy in a press release Monday, saying ... "no signs of trauma were discovered that would have contributed to the death. The cause and manner of death remain pending further investigation and the completion of additional studies."
Hayden Panettiere, or someone close to her, was treated with meds typically used for overdose victims ... TMZ has learned.
We've confirmed, through sources in Greenville, SC, that Narcan was found in the apartment where she died. Narcan is administered nasally to reverse the effects of an opioid overdose, and we're told the device used to dispense it was found on a mattress.
However, we also know 2 ambulances rushed to the apartment, which seems to point to 2 people in distress in the apartment ... so, it's unclear who received the dose of Narcan.
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what i gathered, her boyfriend was staying with her in LA, but he also shared a place with his brother in Greenville. they both went there for a visit.
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