Basing much of its analysis upon the first systematic empirical study of the French pre-trial process, this monograph breaks new ground in the field of comparative criminal justice. Moving away from idealised accounts of judicially supervised investigations, it provides a better understanding of the ways in which an inquisitorially rooted criminal process operates in practice and the factors that influence and constrain its development and functioning. The structure and operation of French criminal justice is set within a broad range of contexts of political, occupational and legal cultures from the French Republican tradition of state-centred models of authority, across the growing influence of the ECHR, to the local conditions which determine the ways in which individual discretion is exercised. The French model of investigative supervision and accountability is contrasted with more adversarial procedures and in particular, the different ways in which the reliability of evidence...