The Los Angeles County Coroner's office released Thursday the autopsy results for Casey Johnson, heir to the Johnson & Johnson fortune and alleged fiancé to Tila Tequila. Johnson's death was ruled a natural one, and the cause of death was identified as diabetic ketoacidosis, a lack of insulin combined with extreme blood sugar levels. The socialite had been diagnosed with juvenile diabetes as a young child, and her unfortunate battles with drug and alcohol certainly did not help. Tequila, for her part, had claimed that Johnson died from a combination of her diabetes and sleeping pill use—a claim not supported by the autopsy. Johnson was found dead in a West Hollywood house on January 5, shortly after announcing her engagement to Tequila.