One important phase of a comprehensive study by the Science and Technology Task Force to determine ways in which science and technology can be applied more effectively to the criminal justice system in the United States has involved the investigation of police communications. Attention has been focused on the problems existing in the major population centers, where message traffic density is high, frequency spectrum crowding is severe, and large numbers of independent networks exist within relatively small geographical areas. This article describes the findings of the investigations and offers some recommendations for solving a number of these problems.