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NCJ Number: 181356 Add to Shopping cart Find in a Library
Title: Analysis of Variables Affecting the Clearance of Homicides: A Multisite Study
Series: NIJ Research Report
Author(s): Charles Wellford; James Cronin
Corporate Author: Justice Research and Statistics Association
United States of America
Date Published: 1999
Page Count: 175
Sponsoring Agency: Justice Research and Statistics Association
Washington, DC 20002
National Institute of Justice (NIJ)
Washington, DC 20531
NCJRS Photocopy Services
Rockville, MD 20849-6000
Grant Number: 96-IJ-CX-0047
Sale Source: Justice Research and Statistics Association
10 G Street N.E., Suite 710
Washington, DC 20002
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Report (Study/Research)
Format: Document
Language: English
Country: United States of America
Annotation: This study was designed to develop a better understanding of the variables that are associated with the clearance of homicide cases.
Abstract: Using data provided by the FBI, the study constructed a data set for 170 cities that consisted of their levels of total crime and homicide; the demographic characteristics of the city; and the number of homicides and other crimes cleared by an arrest for 1980, 1985, 1990, 1991, 1992, 1993, and 1994. In addition to creating and conducting preliminary analyses of these data, the researchers focused on 20 of the largest cities to determine any variations in their clearance rates, changes in clearance rates through this period, and levels of homicide. The analyses showed that clearance rates for most of these cities were relatively stable from 1980 through 1994, although the cities varied considerably in their rates of clearance of homicide. Four cities with relatively stable patterns of clearance and high levels of homicide were selected for detailed analysis of homicide clearance rate variables. The three instruments used in the study yielded data on the circumstances surrounding the homicide case, the investigation process, and the organizational structure of the police departments. The study found that the activities of the first responding officers to secure the scene, to identify potential witnesses, to preserve evidence, and to initiate and participate in neighborhood surveys is critical to homicide clearance rates. The speed with which homicide detectives, evidence technicians, and medical examiners are notified and the time it takes them to respond to the scene are associated with clearance. The assignment of three or four detectives is optimal for clearing a case. Policies that allowed responding detectives to stay on the case as long as they thought necessary without seeking approval were critical. The data also suggested the increased importance of computer checks of various types, particularly checks on guns, suspects, and victims. 12 references and appended study instruments and data
Main Term(s): Police policies and procedures
Index Term(s): Clearance rates; Homicide; Homicide investigations; Investigative techniques
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