It has been reported by the Los Angeles County coroner that Casey Johnson, heiress to the Johnson & Johnson fortune, died of natural causes related to diabetes. Casey Johnson was found dead at a friend’s house on January 4, 2010. She was only 30 years old at the time of her death. She died of diabetic ketoacidosis, a serious complication of untreated diabetes. Casey was recently in the limelight due to her relationship with reality television star Tila Tequila.