Casey Johnson, the socialite daughter of New York Jets owner Woody Johnson and heiress to the Johnson and Johnson business empire has died, a spokesman for the family and police said. She was 30. TMZ.com reported that Johnson was found dead Monday. Police officers responded to her Los Angeles home around 11:51 A.M. where paramedics had already pronounced Johnson dead, officer Sara Faden said. Faden said she did not know how long Johnson may have been dead by the time authorities arrived. She said Johnson's death may have been from natural causes since a preliminary investigation turned up no signs of foul play. But Faden added that a final cause of death will be determined by coroner's officials, who will seek toxicology tests. Results of those tests could take six weeks to obtain. In a statement the Johnson family said it __
