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John S. Dempsey

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John S. Dempsey was a member of the New York City Police Department (NYPD) for 24 years. He served in the ranks of police officer, detective, sergeant, lieutenant, and captain. His primary assignments were patrol and investigations. He received seven citations from the Department for meritorious and excellent police duty. After retiring from the NYPD, Professor Dempsey served on the faculty of Suffolk County Community College, where he won the college's prestigious "Who Made a Difference Award" for his teaching and work with students, until 2003. Currently, Professor Dempsey serves at the State University of New York Empire College, where he teaches criminal justice and public administration courses and mentors ranking members of law enforcement and criminal justice agencies. John S. Dempsey is the author of Introduction to Investigations, Introduction to Policing and Introduction to Private Security.

According to the book description of Introduction to Investigations it “is a basic introductory text for college students who are interested in learning who investigators are, what they do, and how they do it. Dempsey has designed a text that gives students a general overview of investigations so they can understand why and how investigations are conducted. This text also introduces students to what types of jobs are available in the investigating industry and what skills are needed to obtain these jobs.”

According to the book description of Introduction to Policing, “This current insider's look at what policing means today is ideal for anyone interested in learning who the police are, what they do, and how they do it. Introduction to Policing features comprehensive coverage of all major topics, emphasizing today's most current technology, the newest statistical data, and important new directions such as homeland defense and community policing. A "must read" for anyone considering a career in law enforcement, this book gives you straightforward information about the many rewards, and the often intense stress, that are part of police work.”

According to the book description of Introduction to Private Security, “Interested in a career in private security? With Dempsey's timely book, you'll gain real-world insight into today's field. Dempsey explains the role of private security in the context of a society highly aware of criminal activity and terrorism, and also addresses your practical concerns -"How do I get a job?" "What kinds of jobs are available to me, and what responsibilities will I have?" "What skills do I need?" As you read, you'll also learn about the ethics and professionalism expected of you, and the vital role that you'll play in partnering with public law enforcement in the solution to your community's problems.”

An Introduction to Policing
John S. Dempsey  More Info

Introduction to Investigations
John S. Dempsey  More Info

Introduction to Private Security
John S. Dempsey  More Info

From the History of the New York City Police Department 

The Watch committee was instructed to investigate the method of conducting the Watch which prevailed, and report thereon to the Common Council. The report was rendered April 24, 1826, and it opened with an assurance that the committee had exerted themselves to obtain that practical information necessary to form correct opinions. The result of their labors, laid before the Board, is as follows:

"Your committee have on various occasions, and at such unexpected seasons as to render it certain that their visits were not anticipated, visited the watch houses, have found them clean and orderly, as far as regards the Watchmen, and that in general, proper respect is paid to the commanding officers, and a wholesome subordination used in all their regulations. The Watchmen as a body are men to whom your Committee feel confident our citizens may properly confide the safety of their lives and property; they are, however, men, and it would hence be unreasonable to expect that they should be faultless, or that there should not be among them those who dishonor their station, and have been found and promptly dismissed, and your committee believe that a rigid adherence to the present test for qualifications will rid the Watch of its improper members, and insure to the city a corps whose active exertions and integrity may be relied on."


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