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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Kevin LaChapelle, El Cajon Police Department
Kevin Lackey, Wichita Police Department
Peter E. Laksbergs, San Antonio Police Department
John Lamb, Oceanside Police Department
Jim Lambert, Contra Costa County Sheriff's Office
Mark Lambert, Pittsburg Police Department
Ralph W. Landre, California Highway Patrol
Tom Lange, Los Angeles Police Department
Patrick B. Langley, Jefferson Parish Sheriff's Office
Russel Langely, Sutter County Sheriff's Department
Mark B. Langford, Basalt Police Department
William Langlois, San Francisco Police Department
Mike LaPaglia, Ulster County Sheriff’s Office
James Lardner, Metropolitan Police Department
Maria Larsen, San Diego Police Department
Lance LoRusso, Cobb County Police Department
Dave Lauck, Campbell Country Sheriff's Office
Larry Layman, Peoria Police Department
Bill Leahy, Saint Louis Municipal Police Department
Robert N. Leary, Berlin Police Department
Edward F. Leddy, New York State Parole
Clarence D. Lee, Berkeley Police Department
Thomas O. Lee, New York State Police
V. A. Leonard, Berkeley Police Department
Leo LePage, Hartford Police Department
Wayne LeQuang, California State University, Fullerton, Police Department
Robert Leuci, New York Police Department
Michael Levine, Barnstable County Sheriff's Office
Jon Lewis, Newport Beach Police Department
Kenneth R. Lewis, Rogue River Police Department
Richard Lewis, New York Police Department
Stephen Leinen, New York City Police Department
Brian Levin, New York Police Department
Ernie Lijoi, Sr., Quincy Police Department
James H. Lilley, Howard County Police Department
Mark Lindsay, Baltimore Police Department
Cliff Lindquist, San Mateo County Sheriff's Office
Timothy Lindstrom, New Baltimore Police Department
Frank Lione, New York Police Department
Wayne R. Lippert, Los Angeles County Sheriff's Department
William Lippert, Salinas Police Department
Harold K. Lloyd, Philadelphia Police Department
Lisa Lockwood, Chicago Police Department
Frank Lombardo, New York Police Department
Ronald Long, Pulaski County Sheriff's Department (Missouri)
J.R. Lonsway, Las Cruces Police Department
Joseph K. Loughlin, Portland Police Department
Bernard Loughran, Philadelphia Police Department
Gary C. Lovett, Atlanta Police Department
Neil Low, Seattle Police Department
Anne Lowery, Cortland Police Department
James Lowney, New York City Transit Police Department
Jack R. Lundquist, Oakland Police Department
Charles Lushbaugh, Sacramento County Sheriff's Department
Michael D. Lyman, Oklahoma Bureau of Narcotics and Dangerous Drugs
Matthew J. Lyons, Oceanside Police Department
Don Lucier, Los Angeles Police Department
Duff Lueder, Wexford County Sheriff's Office