Full Professor of Criminal Procedure at the University of Roma Tre and practices longtime as lawyer in criminal litigations. He is author of numerous scientific publications, both Italian and International, focused on the right to silence of the accused, the negotiated criminal justice, the role of the Public Prosecutor in the criminal process and the system of appellate remedies, especially on inadmissibility of cassation appeal. He has been Visiting professor or researcher in foreign Institutes and Universities in Europe and America and lecturer in international conferences.  Professor Marafioti is also co-director of the editorial series “Processo penale e politica criminale” and member of the editorial board of several legal journals.