Death
Later that evening, Silkwood's body was found in her car, which had run off the road and struck a culvert. The car contained no documents. She was pronounced dead at the scene from a "classic, one-car sleeping-driver accident". The trooper at the scene remembers that he found one or two tablets of the sedative methaqualone (Quaalude) in the car, and he remembers finding marijuana. The police report indicated that she fell asleep at the wheel. The coroner found 0.35 milligrams of methaqualone per 100 milliliters of blood at the time of her death — an amount almost twice the recommended dosage for inducing drowsiness.<7>
However, some<8> have theorized that Silkwood's car was rammed from behind by another vehicle and with the intent to cause an accident that would result in her death. Skid marks from Silkwood's car were present on the road, which have prompted some to suggest that she was desperately trying to get back onto the road after being pushed from behind.<4>99-101,114-115
Investigators also noted damage on the rear of Silkwood's vehicle that, according to Silkwood's friends and family, was not present prior the accident. The crash was entirely a front-end collision, so there would be no explanation for the damage to the rear of her vehicle. A microscopic examination of the rear of Silkwood's car showed paint chips that could only have come from a rear-impact from another vehicle. Silkwood's family claimed that Silkwood did not have any accidents or fender-benders with the car that they knew of, and that the 1974 Honda Civic she was driving was not a used car when it was purchased. Further, there had been no insurance claims filed on the vehicle.<4>:114-115
The car did not contain any documents, which relatives swore she took with her and had placed on the seat beside her, leading some to allege that they were stolen from her car immediately after the crash in order to silence her allegations concerning her workplace. According to Silkwood's family, she had received several threatening phone calls very shortly before her death. Such speculation about foul play has never been substantiated.<4>
Silkwood's organs were analyzed as part of the Los Alamos Tissue Analysis Program by request of the Atomic Energy Commission and the State Medical Examiner. Much of the radiation was in her lungs, which tends to suggest that the plutonium was inhaled. When her tissues were further examined, the second highest deposits were found in her gastrointestinal organs.
Public suspicions led to a federal investigation into plant security and safety, and a National Public Radio report concerning 44 to 66 pounds of misplaced plutonium. Silkwood's story emphasized the hazards of nuclear energy and raised questions about corporate accountability and responsibility. Kerr-McGee closed its nuclear fuel plants in 1975. The grounds of the Cimarron plant were still being decontaminated 25 years later.<7>
Link:
http://en.wikipedia.org/wiki/Karen_Silkwood#Death:shrug: