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NCJRS Abstract

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NCJ Number: 148116 Find in a Library
Author(s): P W Greenwood; J Petersilia
Corporate Author: Rand Corporation
United States of America
Date Published: 1975
Page Count: 47
Sponsoring Agency: National Institute of Justice/
Rockville, MD 20849
Rand Corporation
Santa Monica, CA 90407-2138
US Dept of Justice
Grant Number: 73-NI-99-0037-G
Publication Number: R-1776-DOJ
Sale Source: Rand Corporation
1776 Main Street
P.O. Box 2138
Santa Monica, CA 90407-2138
United States of America

National Institute of Justice/
NCJRS paper reproduction
Box 6000, Dept F
Rockville, MD 20849
United States of America
Document: PDF
Type: Research (Applied/Empirical)
Language: English
Country: United States of America
Annotation: A 2-year study of police investigation was conducted to describe national investigative organization and practices, assess the contribution that police investigation makes to the achievement of criminal justice goals, determine the effectiveness of new technology and systems being used to improve investigations, and relate investigational effectiveness to differences in organization.
Abstract: Data were collected from questionnaires completed from 153 jurisdictions whose law enforcement departments had 150 or more officers. Over 25 agencies were then selected for more detailed study. The results of the study are presented in three volumes; this volume includes a summary and discusses policy implications. The study found that differences in investigative training, staffing, and procedures had little effect on crime, arrest, or clearance rates. The method by which police investigators were organized was also not related to variations in crime, arrest, and clearance rates. The most important determinant of a successful investigation was the information supplied by the victim to the immediately responding patrol officer. Routine police procedures often led to the clearance of crimes in which the perpetrator was not immediately identifiable at the beginning of the investigation. While investigators often collected from physical evidence than could be productively analyzed, latent fingerprints were rarely the only basis upon which a suspect was identified. Police failure to document a case investigation thoroughly can contribute to a higher case dismissal rate. The researchers made several recommendations designed to save resources and lead to a greater number of arrests and successful prosecutions. Chapter references
Main Term(s): Police effectiveness
Index Term(s): Clearance rates; Investigative techniques; Police casework
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