Criminology Commons^™

Risk Factor And High-Risk Place Variations Across Different Robbery Targets In Denver, Colorado, Nathan T. Connealy, Eric L. Piza

Publications and Research

Purpose

Risk Terrain Modeling (RTM) has been effectively used to spatially diagnose risk for crimes such as robbery, aggravated assault, and gun violence. An important contribution is to consider how risk differs across individual crimes and different target types. This study tests four different robbery target types in unique models to examine the potential for variation across significant risk factors and high-risk locations.

Methods

Using the online diagnostic software RTMDx, individual robbery models were run for four robbery target types in Denver, Colorado: commercial (businesses), carjacking (driver/vehicle), residential (home/dwelling), and street (pedestrians). A conjunctive analysis of case configurations was also …

Crimmigration, Deportability And The Social Exclusion Of Noncitizen Immigrants, Shirley P. Leyro, Daniel L. Stageman

Publications and Research

The spread of crimmigration policies, practices, and rhetoric represents an economically rational strategy and has significant implications for the lived experience of noncitizen immigrants. This study draws up in-depth interviews of immigrants with a range of legal statuses to describe the mechanics through which immigrants internalize and respond to the fear of deportation, upon which crimmigration strategies rely. The fear of deportation and its behavioral effects extend beyond undocumented or criminally convicted immigrants, encompassing lawful permanent residents and naturalized citizens alike. This fear causes immigrants to refuse to use public services, endure labor exploitation, and avoid public spaces, resulting in …

The History, Policy Implications, And Knowledge Gaps Of The Cctv Literature: Insights For The Development Of Body-Worn Video Camera Research, Eric L. Piza

Publications and Research

Closed-circuit television (CCTV) and body-worn video cameras (BWVCs) have rapidly spread throughout policing. Such widespread deployment has heightened the importance of identifying best practices for both of these technologies. The research community has worked toward the identification of such best practices, with bodies of knowledge emerging for both CCTV and BWVCs over recent decades. Given its earlier emergence, research on CCTV is more developed. Nonetheless, the BWVC literature is quickly becoming robust, with BWVC research developing at a much more rapid pace than research on most other police technologies. This essay reviews the CCTV and BWVC literatures across four main …

Measuring The Effect Heterogeneity Of Police Enforcement Actions Across Spatial Contexts, Eric L. Piza

Publications and Research

Purpose: This study tests whether the effect of police actions is influenced by similar crime generators and attractors (CGAs) that influence crime. Said differently, in recognition that the presence of CGAs presents higher risk of crime at certain places, we test whether CGAs similarly create a situation where specific police enforcement actions are more effective at certain types of places than others.

Methods: Using longitudinal logistic regression models incorporating panel data, we measure the effect of various police enforcement actions on gun violence in Newark, NJ. Risk Terrain Modeling (RTM) was further used to test whether the effect of the …

Script Analysis Of Open-Air Drug Selling: A Systematic Social Observation Of Cctv Footage, Victoria A. Sytsma, Eric L. Piza

Publications and Research

Objectives: Through the use of closed-circuit television (CCTV) video foo- tage, the current study builds upon the drug transaction work of Piza and Sytsma by developing a crime script for open-air drug selling.

Methods: Researchers conducted a systematic social observation of CCTV footage of open-air drug markets in Newark, NJ. The data were used to identify sequential stages of drug transactions. Fisher’s exact tests measured whether buyer and seller activities during specific acts of the drug transaction event were related to activities seen in subsequent stages.

Results: This study finds three distinct acts to open-air drug events. During the pretransaction …

The Crime Prevention Effect Of Cctv In Public Places: A Propensity Score Analysis, Eric L. Piza

Publications and Research

This study measures the effect of CCTV in Newark, NJ across three separate crime categories: auto theft, theft from auto, and violent crime. CCTV viewsheds, denoting camera line-of-sight, were units of analysis. Viewsheds for treatment units were created by digitizing live CCTV footage within a geographic information system (GIS). Control viewsheds were created with GIS tools and aerial imagery from Google maps. Treatment cases were matched with control cases via propensity score matching (PSM) to ensure statistical equivalency between groups. Effect was measured via odds ratios and average treatment on the treated statistics. Findings offer modest support for CCTV as …

The Effect Of Various Police Enforcement Actions On Violent Crime: Evidence From A Saturation Foot-Patrol Intervention, Eric L. Piza

Publications and Research

The current study tests the crime prevention effect of different police actions conducted during a foot-patrol saturation initiative in Newark, New Jersey. Police actions were categorized into two typologies: enforcement actions (i.e., arrests, quality of life summonses and field interrogations) and guardian actions (i.e., business checks, citizen contacts, bus checks, and taxi inspections). Logistic regression models tested the effect of enforcement and guardian actions on crime during daily (i.e., 24-hr) periods as well as the intervention’s operational (6:00 p.m.-2:00 a.m.) and nonoperational (2:00 a.m.-5:00 p.m.) periods. Analyses were conducted twice, once for the Operation Impact target area and once for …

Facilitators And Impediments To Designing, Implementing, And Evaluating Risk-Based Policing Strategies Using Risk Terrain Modeling: Insights From A Multi-City Evaluation In The United States, Eric L. Piza, Les W. Kennedy, Joel M. Caplan

Publications and Research

The contemporary policing literature contains numerous examples of partnerships between academic researchers and police agencies. Such efforts have greatly contributed to evidence-based policing by increasing the knowledge base on effective strategies. However, research has demonstrated that successful collaboration between researchers and practitioners can be a challenge, with various organizational and inter-agency factors presenting difficulties at various stages of the process. Additionally, applied research can oftentimes face implementation challenges when the time comes to convert research into practice. The current study contributes to the literature by discussing researcher/practitioner partnerships and program implementation in the context of a multi-city risk-based policing project …