from training.npr.org: https://training.npr.org/sources/giannina-segnini/
Giannina Segnini is the John S. and James L. Knight Professor of Professional Practice in Data Journalism and director of the Master of Science Data Journalism Program at Columbia Journalism School. Her research focuses on using data to investigate across borders.
Paul Butler is the Albert Brick Professor in Law at Georgetown University Law Center, teaching in the areas of criminal law and race and the law. He served as a federal prosecutor with the U.S. Department of Justice, where his specialty was public corruption. He is also a legal analyst on MSNBC.