Chicago Police Department
Heavy Badge, a great site dealing with the burdens of police work
Une Flic, an interesting blog on police work and other matters by retired cop Jill Wragg
Criminal Justice Resources, Florida State University
The Nathanson Centre for the Study of Organized Crime and Corruption, an academic site covering all aspects of organized crime
American Mafia, a site covering traditional organized crime
The Independent Mystery Booksellers Association It's tough to compete with the superstores. Find one of these great specialty mystery bookstores in your area and support it-- these are the people that know and love the genre.
The Book Cellar A fine independent bookstore in Chicago's Lincoln Square neighborhood with attached wine bar. Now there's a great concept.
Mystery One, Richard Katz's fine Milwaukee store.
Otto Penzler's Mysterious Bookshop, a great mystery bookstore in New York
M is for Mystery, Bay Area (San Mateo) mystery bookstore with great selection, busy events schedule.
Mystery Writers of America
Readers' Circle
The Outfit, a collective blog by some good Chicago crime writers
The Rap Sheet, great crime fiction blog associated with January Magazine
Tim Broderick Comics artist Tim Broderick does crime stories. Cool stuff.
Can't Stop, Won't Stop Check out California writer Sophie Littlefield's wide-ranging blog.