Casey Johnson, the 30-year-old heiress to the Johnson & Johnson fortune and tabloid sensation, was found dead in her apartment Monday. She had most recently made headlines for her engagement to Internet fameball Tila Tequila, who says she last saw Johnson on December 28 when they fought. She also had recently lost custody of her adopted daughter to her mother. Johnson was reportedly cut off from her trust fund by her family recently due to her struggles with substance abuse and her public antics, which included grand-theft charges. TMZ reports that Johnson had previously suffered from diabetic comas. She had been dead for several days when authorities found her, and the LAPD has opened an investigation into the death.