According to the autopsy report, Victoria Siegel, died from methadone and sertraline toxicity.
Siegel was the daughter of billionaire David Siegel and Jackie Siegel.
The coroner has ruled her death an accidental overdose.
At the time of her death, her parents believed she was self-medicating to help deal a cyber attack.
The Siegels were the subjects of a 2012 documentary, The Queen of Versailles, which followed the family build the largest home in the United States.
In the time since, nothing has gotten any easier for their family.
Her mother told Inside Edition that she hasn’t been able to step inside her Windermere home since her 18-year-old daughter died.
