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 Apple Podcasts, Spotify, Amazon Music, or wherever you get your podcasts.

A scrap of paper that Linda found in Ruffo’s coat pocket reveals an early clue pointing investigators to Italy. Does Ruffo’s Italian barber know more? U.S. Marshals head to Rome for answers in the midst of a global pandemic. They try and rekindle the search for the fugitive on the Adriatic coast. Back home, Ruffo's former wife contemplates a reunion she both dreads and desperately wants.

To see photos of John Ruffo, including an age progression image provided by the U.S. Marshals, visit https://abcn.ws/37tRIK2.

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In secret diaries he left behind, John Ruffo spins an exotic Cold War tale. But is it all part of another Ruffo con? Did one FBI veteran carry crucial information to the grave? We go in search of retired agents and an infamous convicted FBI turncoat to see if any of them hold answers to the mystery of Ruffo’s escape.

To see photos of John Ruffo, including an age progression image provided by the U.S. Marshals, visit https://abcn.ws/37tRIK2.

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Investigators thought they knew John Ruffo when they exposed his crime. But in tape-recorded prison calls, Ruffo’s accomplice tells the FBI they don't know the half of it. One of Ruffo’s lawyers reveals the reason he needed a top secret clearance to mount Ruffo’s defense. And as Ruffo’s past takes shape, U.S. Marshals enter a maze of fake identities and front companies, trying to follow the money. 

To see photos of John Ruffo, including an age progression image provided by the U.S. Marshals, visit https://abcn.ws/37tRIK2.

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Linda Lausten spent 19 years married to a man she never really knew. His escape sent her reeling -- as if widowed by a husband who wasn’t dead. She starts to uncover clues about who John Ruffo really was. As the U.S. Marshals continue their search, go along as a tantalizing lead takes them inside Dodger Stadium. 

To see photos of John Ruffo, including an age progression image provided by the U.S. Marshals, visit https://abcn.ws/37tRIK2.

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The crime was audacious –- the biggest swindle of its time –- falsely trading on the name and clout of American’s tobacco giant, Phillip Morris. Getting access to millions, John Ruffo transformed himself into a Wall Street high roller. He spun fantastical tales of secret government missions. And when it all started to unravel, he ripped a page from a John Grisham thriller, leaving U.S. Marshal criminal profilers to make sense of a cryptic farewell note.

To see photos of John Ruffo, including an age progression image provided by the U.S. Marshals, visit https://abcn.ws/37tRIK2.

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John Ruffo, a small-time computer salesman from New York City with a surprising gift for deception, committed a staggering $353 million bank fraud. After Ruffo was handed a 17-year sentence, the U.S. Marshals had him in handcuffs, ready to haul him off to prison. What happened next would leave a trail of shattered lives and spark one of the longest, most intensive manhunts in U.S. history. 

To see photos of John Ruffo, including an age progression image provided by the U.S. Marshals, visit https://abcn.ws/37tRIK2.

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John Ruffo was an unassuming computer salesman from Brooklyn who engineered one of the most outlandish frauds in American history. He received a 17-year sentence for his $350 million swindle -- but his story didn’t end there. After he turned in his ankle monitor, Ruffo made a final stop at an ATM, drove to JFK Airport and vanished. The ABC News investigative unit now joins the U.S. Marshals as they span the globe and uncover surprising details about his cloak-and-dagger past.

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The search for convicted killer Lester Eubanks winds into the thick woods of Warrior, Alabama, as this podcast and enhanced media attention delivers a steady flow of fresh tips to the U.S. Marshals. The deputy leading the search contracts coronavirus, but not before finding a tiny crack in the wall of silence around the longtime fugitive.

Tell us what you think about this series with a rating and review: http://bit.ly/2O38DdC

"Have You Seen This Man?" is produced by the award-winning ABC News Investigative Unit and ABC Audio, the makers of the #1-rated "The Dropout" and "A Killing on the Cape" podcasts as well as the award-winning daily news series "Start Here." For more: http://www.abcnewspodcasts.com and http://www.abcnews.com/thisman

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The U.S. Marshals explore the potential for genetics to lead them to Lester Eubanks as the manhunt continues to heat up. And the community of Mansfield rallies behind the surviving relatives of Mary Ellen Deener.

Tell us what you think about this series with a rating and review: http://bit.ly/2O38DdC

"Have You Seen This Man?" is produced by the award-winning ABC News Investigative Unit and ABC Audio, the makers of the #1-rated "The Dropout" and "A Killing on the Cape" podcasts as well as the award-winning daily news series "Start Here." For more: http://www.abcnewspodcasts.com and http://www.abcnews.com/thisman

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Mary Ellen's family makes a public plea for help. The US Marshals meet a relative of Lester Eubanks' who appears ready to help. And we make an unexpected discovery. Could an oil painting hold important clues to Lester's whereabouts?

Tell us what you think about this series with a rating and review: http://bit.ly/2O38DdC

"Have You Seen This Man?" is produced by the award-winning ABC News Investigative Unit and ABC Audio, the makers of the #1-rated "The Dropout" and "A Killing on the Cape" podcasts as well as the award-winning daily news series "Start Here." For more: http://www.abcnewspodcasts.com and http://www.abcnews.com/thisman

Learn more about your ad choices. Visit megaphone.fm/adchoices