Casey Johnson dead at 30. 30-year-old socialite and heiress, was found dead Monday at her home. So far authorities are unsure about how she died. Here's more about her wealthy family and her troubled past. Her family: Her great-great-grandfather founded this famous company. Her father owns an NFL team. Her mom is married to a former NFL player. She has two sisters. (What did the family say about her death?)
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