Police Handout
  • Man Abandoned at Birth Searches for Answers

    In 1964, a woman posing as a nurse stole newborn Paul Joseph Fronczak from his mother's arms at the Michael Reese Hospital in Chicago, Illinois.
    Police Handout
  • Man Abandoned at Birth Searches for Answers

    The parents of the stolen infant, Dora and Chester Fronczak, plead to the public to return their son.
    ABC News
  • Man Abandoned at Birth Searches for Answers

    Just over a year later, an abandoned toddler was found almost 800 miles away outside a variety store in Newark, N.J. The young boy was believed to be the stolen baby from Chicago.
    Police Handout
  • Man Abandoned at Birth Searches for Answers

    Dora and Chester Fronczak were sure this was their missing baby, but since the FBI couldn't prove for certain that he was their biological son, they were required to adopt him.
    Family Photo
  • Man Abandoned at Birth Searches for Answers

    "My childhood was great, great family, great mom and dad," Fronczak told ABC News anchor Barbara Walters of his upbringing in Chicago with the Fronczaks.
    Family Photo
  • Man Abandoned at Birth Searches for Answers

    Growing up, Fronczak, seen here as a teen with his father, said he always felt as though he didn't resemble the other members of his family.
    Family Photo
  • Man Abandoned at Birth Searches for Answers

    Last year, Fronczak happened to see a DNA test kit for sale at a local drug store. It was at last an easy answer to the question that had followed him all his life. The hardest part was asking his parents, seen here with him and his wife on their wedding day, for a DNA sample, forcing them to travel back in time, to the most painful part of their lives.
    Family Photo
  • Man Abandoned at Birth Searches for Answers

    After decades of doubt and suspicion, Fronczak finally found out the truth: he was not Dora and Chester Fronczak's biological son. Now, he is on a mission to find out who he really is and what really happened to that stolen baby so many years ago.
    ABC News
  • Man Abandoned at Birth Searches for Answers

    Fronczak, seen here with his wife, Michelle, and daughter, Emma, admits to being obsessed with solving the mystery of his identity, as he juggles the role of husband and father. "I work a full time job. I have a family, but this, this is my life," he said. "This is my only shot at solving these mysteries, so I put as much time as I can."
    ABC News
  • Man Abandoned at Birth Searches for Answers

    Who stole the real Paul Fronczak in 1964, and where is he now? Who is the man who believed he was Paul Fronczak all his life, and where is his biological family? <p> Please send any clues or tips to Barbara Walters and Brian Ross by <a href="http://abcnews.go.com/Blotter/mailform?id=19906573">CLICKING HERE</a>, or contact the FBI by emailing Chicago@ic.fbi.gov or calling 1-800-CALL-FBI.
    ABC News
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