# John Pfaff **URL:** --- John Pfaff is a Professor of Law at Fordham University, where he teaches criminal law, sentencing law, and law and economics. He is the author of [_Locked In: The True Causes of Mass Incarceration—and How to Achieve Real Reform_](https://www.amazon.com/Locked-Causes-Incarceration-Achieve-Reform/dp/0465096913) (2017).