The 18-year-old daughter of Florida resort mogul David Siegel and his wife Jackie died after being found unresponsive over the weekend at the family's Windermere mansion.

Victoria Siegel was found Sunday by a housekeeper. She was pronounced dead later at Health Central Hospital, according to the Orange County Sheriff's Office.

The cause of death has not been confirmed, but her family believes it is likely that Victoria ingested one or more drugs prior to her death.

The Siegel family's attorney, Michael Marder, released a statement Monday night regarding Victoria's condition. They said Victoria had a history of seizures and was prescribed medication, but unfortunately became dependent, according to the statement.

"While an autopsy has been performed the cause of death has not been determined," Marder said. "It is likely that Victoria ingested one or more drugs prior to her death; however, we cannot determine at this time whether or not the drugs she took were in fact prescribed medication, something else, or where and how these drugs may have been obtained."

According to Marder, another girl sent "cruel and hateful text messages" early in the morning on the day of Victoria's death.

"These messages were clearly intended to hurt Victoria, and while we cannot be sure, may have affected her emotional states at a time when she was emotionally vulnerable," he said.

Her father, David, is the founder of Orlando-based Westgate Resorts. The family was attending a wedding in Park City, Utah, during the incident. They were planning to return to Orlando for a family cruise.

David and Jackie Siegel were featured in the 2012 documentary, "The Queen of Versailles," which originally focused on the construction of the family's 90,000-square-foot home.

The family also recently appeared on an episode of "Celebrity Wife Swap."

The cause and manner of Victoria's death remained pending after an autopsy, the Orange County Medical Examiner's Office said Monday. Victoria was also undergoing rehabilitation and was working hard to address the problem.

David and Jackie Siegel on Tuesday announced they plan to start the Victoria Siegel Foundation in an effort to help troubled teens with addiction issues.

"It is with great sadness that we ask you to respect our privacy during this tragic time and the loss of our beloved daughter, Victoria. Thank you all for your prayers and for your support," Jackie Siegel said Sunday.