An esteemed Constitutional Law Professor at the University of Chicago.... ahem!
Well, just one pay grade above the UofChi diversity-hire instructor pool would have known how to distinguish immaterial statements solicited for entrapment, serving no investigative purpose, from "perjury."
Being charged with perjury doesn’t mean you are guilty of it. People get off scot-free all the time when the evidence doesn’t support the charges....of crimes a lot more serious than perjury.