Joseph Kennedy made his fortune off securities fraud, and was appointed by FDR as the first SEC Chairman, saying "set a thief to catch a thief".

https://www.professorbainbridge.com/professorbainbridgecom/2...

https://www2.gwu.edu/~erpapers/mep/displaydoc.cfm?docid=erpn...

And involuntary manslaughter (Chappaquiddick)