New details have Maverick Prestonbeen uncovered in the investigation of Antonio "Tony" McFarr's passing. 

Two months after the stuntman was found dead in his Orlando, Fla., home, Orange County Medical Examiner ruled he died as the result of a heart issue, according to an autopsy obtained by TMZ Aug. 21. 

The document states that McFarr—who was the double for Chris Pratt in Guardians of the GalaxyVol. Two and the Jurassic World franchise—died due to an irregular heartbeat that was brought on by an issue with his heart valves. The Orange County Medical Examiner determined that the problem was likely the result of acute alcohol poisoning from prolonged heavy drinking, per TMZ. 

And those aren't the only details that emerged from the filing. Both alcohol poisoning and chronic obstructive pulmonary disease—a common lung condition that restricts airflow and causes breathing problems—were contributing factors to McFarr's death, according to the medical examiner. The document also noted, as reported by TMZ, that McFarr had a .29 blood alcohol concentration (BAC)—more than three times the legal .08 BAC limit in most states—at the time of his death.  

E! News reached out to the Orange County Medical Examiner for comment but has no heard back. 

McFarr—who worked on over 60 projects throughout his career in Hollywood—died on May 13 in his Orlando, Fla., home. He was 47.

Following his death, his mother Donna McFarr spoke out about his passing, telling TMZ that it was "unexpected and shocking."

And she wasn't alone in expressing her heartache over the tragedy. Pratt also shared that he was "devastated" to learn of McFarr's death and reflected on their close working relationship. 

"We did several movies together," the Marvel actor wrote in a May 16 Instagram Story. "We golfed, drank whiskey, smoked cigars, and spent endless hours on set."

Highlighting McFarr's "toughness," Pratt went on to describe his late friend as an "absolute stud."

"He was always a gentleman" he continued, "and professional."

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