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NCJ Number: NCJ 222911   Add to Shopping cart   Find in a Library
Title: Developing and Testing a Method for Using 911 Calls for Identifying Potential Pre-Planning Terrorist Surveillance Activities
  Document URL: PDF 
Author(s): John Hollywood ; Kevin Strom ; Mark Pope
Corporate Author: RTI International
United States of America
Date Published: 05/2008
Page Count: 121
  Annotation: This project developed and tested an analytical method for identifying useful information from citizen 911 suspicious-behavior reports regarding surveillance of a potential target by terrorists in preparation for an attack.
Abstract: The project succeeded in developing and testing an analytic process that uses 911 calls-for-service (CFS) data in order to identify potential terrorist threats. This means that jurisdictions are not required to spend scarce resources on new systems for tracking suspicious behavior. Also, the techniques developed to analyze the 911 CFS data are straightforward, such that complex analyses and software tools are not needed in order to develop standards for collecting and analyzing information on suspicious activity reported. The number of cases identified as potentially related to terrorist preparatory surveillance activities constituted only a small proportion of all suspicious calls (less than 1,000 calls out of approximately 1.3 million). The approximately 200 potential terrorist surveillance behaviors reported through 911 differed from other suspicious-person and vehicle calls by time of day and call location. Research also identified multiple clusters around the city and were able to assess the risk-level of these clusters. The risk-rating framework for potential terrorist surveillance events consisted of the following criteria: atypicality of reported behaviors/activities, attractiveness of the target apparently the focus of the surveillance behavior, membership in a cluster, and the presence of a police report. For each of these criteria, researchers selected a score for each of the risk levels assigned to each of the criteria. Criteria for a behavior to reach the various risk levels are also described. The study analyzed just over 1.3 million 911 CFS records using data mining approaches and a threat classification system that identified and prioritized suspicious activity incidents that were potentially related to preattack activities. 28 figures, 13 tables, 40 references, and appended CFS datafile variables, additional analysis of 2007 incidents, methodology implementation guide, and a framework for conducting data fusion
Main Term(s): Domestic Preparedness
Index Term(s): Crime prevention measures ; Nine-one-one (911) emergency telephone number ; Counter-terrorism tactics ; Terrorist tactics ; Crime prevention planning ; NIJ final report
Sponsoring Agency: National Institute of Justice (NIJ)
US Department of Justice
Office of Justice Programs
United States of America
Grant Number: 2006-IJ-CX-0024
Sale Source: National Institute of Justice/NCJRS
Box 6000
Rockville, MD 20849
United States of America
Type: Report (Study/Research)
Country: United States of America
Language: English
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