In two separate accidents in April 1973, five people died during the building of the Sears Tower, now known as the Willis Tower. On April 14, 1973, Jack De Klerk, 28, fell 35 feet after an iron cable pushed him off a platform on the 109th floor. On April 17, 1973, Darlene Judkins, 22, James Williams, 24, and William "Bill" Anderson, 26, all employees of the Chicago branch of Sears, Roebuck & Company, died when the elevator they were riding broke down between floors 95 and 96. The cause of the accident was never determined. The first death at the construction site of the Sears Tower occurred on April 14, 1973, when 28-year-old Jack De Klerk fell 35 feet to his death while working on the ninth floor of the building. According to police reports at the time, Mr. De Klerk had been standing on a steel beam that served as a catwalk between two buildings being joined together. He apparently lost his balance and fell toward some metal cables lying on the ground below. There were no signs of foul play and an investigation by the Cook County medical examiner's office concluded that he had died of multiple injuries caused by the fall. Four other people also died during the building of the Sears Tower.