Fifty years later, what can that original bumper tell us about the cause of Karen's accident? In our final episode, an accident reconstructionist combs through the original evidence, creates a computer simulation of the crash, and reveals his findings to the Silkwood family. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Three investigators tried to solve the mystery of what happened to Karen Silkwood on that dark highway the night of November 13th, 1974. An accident investigator hired by the union believed so strongly that Karen?s car had been forced off the road that he saved the bumper as evidence, handing it down to his daughter on his deathbed. A private eye pieced together a theory that Silkwood was under surveillance. And a state trooper launched his own investigation inside law enforcement. They all hit dead ends. Or did they? Learn more about your ad choices. Visit podcastchoices.com/adchoices

We retrace the final days of Karen?s life: she?s been so badly contaminated by radioactive material that men in hazmat suits show up to inspect her apartment, strip much of it down to the studs, and seal her possessions into 55-gallon drums for disposal. Karen grows fearful the contamination will kill her. Years after her death, Karen's family sues Kerr-McGee for the contamination and for the first time, her allegations against the company are tested in court. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Karen Silkwood worked for Kerr-McGee, an oil and gas behemoth that was expanding into the nuclear power industry. Escalating production quotas lead to more accidents at the plant, and Karen quietly travels to Washington DC to report concerns about worker safety to her union and to regulators. Before leaving, she volunteers for a risky assignment.  Learn more about your ad choices. Visit podcastchoices.com/adchoices

Who was Karen Silkwood and why was her death so captivating that it spawned a Hollywood movie? We?ll meet two Oklahoma reporters determined to run down the facts. An investigator?s tapes rediscovered in a dusty storage vault raise the voices of the dead. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Karen Silkwood?s death 50 years ago this November continues to haunt Oklahoma and the nation. The 28-year-old plutonium plant worker died in a fatal crash while driving to meet a reporter with The New York Times allegedly to deliver evidence documenting unsafe conditions at the plant. Two reporters who covered the Silkwood story in 1974 have spent years trying to piece together what many in Oklahoma speculate: Karen Silkwood may have died for what she knew. Fifty years later, hear newly-discovered investigative tapes, deathbed conversations and long-awaited interviews reexamining what happened that night. Learn more about your ad choices. Visit podcastchoices.com/adchoices