A Killing On the Cape

Trailer: 'Radioactive: The Karen Silkwood Mystery'

Introducing a new investigative true crime series: "Radioactive: The Karen Silkwood Mystery." 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. Listen to Ep. 1 on <a href="https://podcasts.apple.com/us/podcast/radioactive-the-karen-silkwood-mystery/id1774300672"> Apple Podcasts</a>, <a href="https://open.spotify.com/show/485oa87T5clgVPHoxwwZsO?si=w7k792tJRjura2m7LOLCmQ"> Spotify</a>, <a href="https://music.amazon.com/podcasts/f03c7b05-859a-4f9b-8f13-dbf9630c21cd/radioactive-the-karen-silkwood-mystery"> Amazon Music</a>, or <a href="https://abcaudio.com/podcasts/radioactive-the-karen-silkwood-mystery/"> wherever</a> you get your podcasts.

It was a crime that rocked an idyllic seaside town in Cape Cod -- the 2002 murder of Christa Worthington, found stabbed to death with her 2-year-old daughter, unharmed at her side. What came next was a three-year search for her killer that would involve unorthodox steps by police, a lengthy list of potential suspects, and an entire town under suspicion. Christa's trash collector, Christopher McCowen, would eventually be convicted of the crime, but his trial would raise questions about the evidence, investigative methods, and whether racial prejudice played a role. Now, ABC Radio and "20/20" take a look at all the evidence and for the first time ever, hear directly from Christopher McCowen, to examine whether the right man is behind bars.