The story of Paul Fronczak has shaken the US as it became the second-longest cold case in US history. Still a baby, Paul was abducted from his parents and later found abandoned in a stroller in 1965. Initially, The Fronczaks were sure that they had found their lost child, but over time, doubt settled in. As Paul was getting older, the family noticed that he looked less and less like either of the Fronczaks and the family decided to order a DNA test.

But in 2012, a test concluded that the child was not the Fronczaks’ and Paul suddenly had no idea who he was. Paul was eventually able to track down his true identity of Jack and learned that both his parents had died. While the mystery did help Paul Jack discover who he was, he also learned that he had a twin sister known as Jill who remains missing to this day. Unfortunately, the Fronczaks still don't know what became of their biological child either.