This followed the implementation of right-to-silence restrictions in Northern Ireland prosecutions and the passage of general legislation that altered the standards for the admissibility of confessions. Observing the process under way in Great Britain leads to inevitable comparisons with the self-incrimination debate in the U.S. After all, both countries share the same common law history out of which the right of silence grew, and each has a long-standing commitment to an adversary system of justice in which the self-incrimination privilege is a central feature. The potential impact on police investigative practices and the uncertainty as to the probative value of a defendant's silence in court are problems that both countries are likely to experience if restrictions are imposed on the right to silence. However, because policing in Great Britain is centralized and the U.S. police fragmented, there is even a greater need for measures to protect the right to remain silent in the U.S. in order to avoid the risk of abuse.