Brian Hickerson Gave Hayden Panettiere Narcan After Apparent Overdose, His Brother Zach Says

More details are coming to light about the day Hayden Panettiere died.

Before the Heroes alum was treated by first responders for an apparent overdose and cardiac arrest, according to 911 dispatch audio, her on-and-off boyfriend Brian Hickerson treated her with the overdose reversal medication Narcan, according to his brother Zach Hickerson.

After Brian and Zach realized that Panettiere was unconscious in the Greenville, S.C., apartment where she was staying, Zach told TMZ in a statement, “I immediately called 911 and Brian gave her Narcan.”

“We then jointly performed CPR while 911 was on speaker until Fire and EMS arrived,” the pastor, who alongside his brother was present at the apartment complex when she was pronounced dead, added. “At that point we watched as they tried every measure possible to save her life.”

Brian’s attorney had no comment when reached by E! News regarding Zach’s statement.

Following her death, Greenville County Coroner Mike Ellis performed an autopsy and noted in his report, obtained by E! News, that “no signs of trauma were discovered that would have contributed to the death.” (Her cause and manner of death have not been released.)