This book shows how the participation of interpreters as mediators changes the dynamics of police interviews, particularly with regard to power struggles and competing versions of events. Employing a range of approaches including conversation analysis, interactional sociolinguistics and legal narrative theory, Interpreter-mediated Police Interviews provides a detailed study of the impact of interpreter mediation on this area of the justice system. It reveals how turn-by-turn decisions of communication by all three participants, including the interpreter, affect the trajectory of the institutional discourse. By providing a better understanding of police interview discourse and exploring the practical implications of interpreter participation, this book contributes to the improvement of interpreter-mediated investigative interviews and will be of great interest to legal professionals as well as interpreters and their trainers.