The official cause of death of 30-year-old UFC heavyweight fighter Shane Del Rosario was listed as lack of oxygen to the brain, an abnormal heart rhythm associated with heart attacks and a congenital heart disorder. Unfortunately there may have been other contributing factors.

After Orange County coroner Daniel Aikin ran an autopsy, he relayed to MMAJunkie that he found cocaine, opiates and THC still in the system of Del Rosario. Anoxic encephalopathy, ventricular fibrillation and Long QT syndrome were the clinical causes of death, according to the certificate. The drugs were listed as “other significant conditions contributing to death but not resulting in the underlying cause.”

Del Rosario was said to be found incapacitated by his roommate and fellow fighter Ian McCall on Nov. 26. And though it wasn’t until Dec. 9 that he was pronounced dead, Dec. 3 was when he was said brain dead, according to HOAG neurologist.