APB Online is a news-centered network of programs exclusively devoted to every element of the police and crime genre. APB's team includes a 35-person New York newsroom, managed by newspaper and TV journalists; more than 70 national correspondents; and an advisory board composed of well-known criminal justice and media professionals. It was launched in November 1998.

Contains good historical data and pictures.

Berkeley Police Department’s homepage; includes historical pictures.

This site describes the Boston Police Strike of 1919.