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William Cavenaugh

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DUI Enforcement: The Street Cops Guide to The Recognition, Arrest and Successful Prosecution of Alcohol and Drug Impaired Drivers
William Cavenaugh  More Info

About the Laguna Beach Police Department

The Laguna Beach Police Department consists of 50 sworn police officers and over 30 civilian police employees.  A small, yet full-service law enforcement agency, it is organized into three divisions: Field Services, Investigative Services and Support Services.  According to the Laguna Beach Police Department, “Patrol consists largely of uniformed field personnel responsible for enforcement of municipal, state and federal laws. The Patrol Section with its 38 field officers is the main response team for calls for service. Officers are responsible for a specific area and respond to calls, patrol trouble spots and document incidents in that area.

The Investigations Division is responsible for investigating crimes that go beyond the scope of patrol.  Complex cases can take hundreds of hours of follow-up work to bring the case to a successful conclusion.  Many cases take years to bring a suspect to justice.  Experienced and well trained investigators must meticulously and thoroughly gather evidence, interview witnesses, prepare search warrants and use all of the legal resources at their disposal to identify a suspect.

This division provides support functions for the department as a whole including communications (or dispatch), management of records, facility maintenance, purchasing, computer systems, planning and research, vehicle maintenance, trusty program, jail operations and statistical services.”

William Cavenaugh, M.S.

Bill retired as a Captain form the Laguna Beach Police Department after 30 years of service in California. The majority of his career was spent in uniform, assigned to traffic enforcement as a motorcycle officer during which time he made thousands of arrests for DUI. Since 1986 he has conducted a one-week long POST approved course on DUI enforcement. The course has regularly been one of the highest rated course in California POST training. Bill also recently retired as a Colonel form the Marine Corps Reserve after thirty-six years of service.


Bill is the recipient of MADD, USA’s Lifetime Achievement award for his contribution to DUI enforcement. In 2004, Bill received the Governor’s Award for Life Time Achievement in California law enforcement training, primarily for his efforts in DUI enforcement education.


Book Description

This text is designed to provide the student with an understanding of the evolution of the methods for conducting narcotics investigations. Interaction among law enforcement agencies as well as contemporary factors regarding investigative complexity will be examined. Students will also be exposed to alternative solutions to the narcotics problem.


This textbook is appropriate for criminal justice, criminal investigation, and homeland security programs. It is also suited for programs in emergency management, corporate security, psychology, emergency medical services and healthcare, police academy programs, and continuing professional development.

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