Colleen Eren, Ph.D., is full professor of Sociology and Criminal Justice at William Paterson University whose research and public writing/speaking centers around her dual interests in criminal justice policy and academic freedom. She is a senior fellow at the Niskanen Center, Reason Foundation, and Heterodox Academy, as well as an expert at the Crime and Justice Research Alliance. Colleen is the author of four books, Reform-Nation: The First Step Act and The Movement to End Mass Incarceration , The Impact of Supreme Court Decisions on U.S. Institutions, and Bernie Madoff and the Crisis: The Public Trial of Capitalism, as well as a book of poetry, Rip Currents. She is a frequent commentator on social issues, appearing in print, including the New York Times, television, including Washington Journal, documentaries, and podcasts.

Prior to entering academia, she was Director of Organizing at New Yorkers Against the Death Penalty, which led a successful statewide campaign to end capital punishment. She is vice president of the board of New Hour for Women and Children, which helps women in reentry. She lives in Huntington, New York.