This is an alphabetical listing of police officers, state troopers, deputy sheriffs and other law enforcement officials who have authored book.  You can also view the list of law enforcement agencies by state, here;  Or, the list of agencies alphabetically, here; Or, use any of the navigation links about to take you to topics, international and federal police officers.

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Lloyd O'Callaghan, Los Angeles Police Department
E. W. "Ted" Oglesby, Los Angeles Police Department
James O'Keefe, New York Police Department
John O'Grady, Los Angeles Police Department
Andrew O'Hara, California Highway Patrol
Charles O'Hara, New York City Police Department
Willard M. Oliver, Arlington County Police Department
William Oldham, New York Police Department
Dean Olson, Douglas County Sheriff's Office
Robert K. Olson, Minneapolis Police Department
Jim O'Neil, New York City Police Department
Charles P. O'Reilly, Elmhurst Police Department
Melquiades “Mike” Ortiz, Los Angeles County Sheriff's Department
William J. O'Shea, Chicago Police Department
Mark Osterman, Detroit Police Department
Fred Otash, Los Angeles Police Department
Tom Owens, Los Angeles Police Department
Barry W. Ozeroff, Gresham Police Department