Speaking of... there seems to be a good chance that Frank Abagnale lied about lying and his biggest con has been making a career out of convincing people of his non-existent previous cons (which in retrospect isn't all that surprising I suppose, there's no a priori reason to believe that an ex-conman has been honest about his ex-cons).

It seems that he had only one big true con: where he conned a woman's family into taking care of him and stealing money from them while he essentially stalked her, was found out and then sent to prison.

https://whyy.org/segments/the-greatest-hoax-on-earth/