Aaron Carter died on November 5th at 34.
The reason for his death was initially postponed, but it has now been proven to be drowning.
The Los Angeles County Medical Examiner-Coroner determined secondary causes to be the effects of alprazolam (Xanax) and difluoroethane, a pressurized gas.
His death was considered an accident, and the investigation has since been closed.
According to the coroner's findings, Aaron became "incapacitated while in the bathtub due to the effects" of the narcotics and drowned.
A house sitter discovered the musician motionless in his Southern California home and contacted authorities.
Aaron's death was confirmed to E! News by his representative.