Albert L. Ortega/WireImage
07/15/2012 AT 06:00 PM EDT
Officials will need another two months to determine what caused the death of Sylvester Stallone's eldest son Sage, a spokesman for the Los Angeles County Coroner told CNN
Sage Moonblood Stallone, 36, was found dead Friday
in his Hollywood home.
The autopsy, which was completed Sunday, still requires the findings of toxicology tests, said the coroner's spokesman.This normally takes six weeks.
In the meantime, there has been conflicting speculation about the possible cause of death.
Some reports suggested Sage may have overdosed on prescription drugs. But his friend and lawyer, George Braunstein, said Sage never showed any signs of drug use or addiction, and didn't even drink.
His final hours are also murky.
Some published reports suggest he may have been dead for three days or longer by the time his body was found. But Braunstein believes that couldn't be true, saying photos of Sage at home were posted to his Facebook page just 17 hours before he was found.
Sage, who acted with his father
in 1990's Rocky V
and 1996's Daylight
, was reportedly set to marry his girlfriend in Las Vegas this weekend.
He wrote and directed the 2006 short film Vic
, and said to be a film geek who idolized his father.