By Daniel Birks, Elizabeth R. Groff, and Nick Malleson

An agent-based model is a form of complex systems model that is capable of simulating how the micro-level behavior of individual system entities contributes to macro-level system outcomes. Researchers draw on theory and evidence to identify the key elements of a given system and specify behaviors of agents that simulate the individual entities of that system—be they cells, animals, or people. The model is then used to run simulations in which agents interact with one another and the resulting outcomes are observed. These models enable researchers to explore proposed causal explanations of real-world outcomes, experiment with the impacts that potential interventions might have on system behavior, or generate counterfactual scenarios against which real-world events can be compared. In this review, we discuss the application of agent-based modeling within the field of criminology as well as key challenges and future directions for research.

Annual Review of Criminology, Vol. 8:75-95 January 2025)

By Jack Katz and Nahuel Roldán

Criminology is haunted by state-structured biases. We discuss five. (a) With the spatial boundaries and the binary deontology they use to count crime, governments draw researchers into ecological fog and sometimes fallacy. (b) All legal systems encourage criminologists to promote untenable implications of socially stratified criminality. (c) To degrees that vary by time and place, the scope of criminological research is compromised by methodological nationalism. (d) State agencies use chronologies that repeatedly draw researchers away from examining the nonlinear temporalities that shape variations in criminal behavior. (e) State agencies produce data that facilitate explaining the why of crime, but scientific naturalism would first work out what is to be explained. We recommend a criminology that begins by describing causal contingencies in social life independent of governments’ labeling of crime.

Annual Review of Criminology, Vol. 8:53-73 , January 2025

By John Hagan

My interest in criminology grew as the Vietnam War escalated. I applied to two Canadian graduate schools and flipped a coin. The coin recommended the University of Toronto, but I chose the University of Alberta, which had a stronger criminology program. I wrote a dissertation about criminal sentencing, which led to an Assistant Professorship at the University of Toronto. Dean Robert Pritchard of Toronto’s Law School encouraged my work and later successfully nominated me for a Distinguished University Professorship. My interests continued to grow in international criminal law. A MacArthur Distinguished Professorship at Chicago’s Northwestern University and the American Bar Foundation facilitated my research at the Tribunal for the Former Yugoslavia. I followed this by studying the crime of genocide in Sudan and later the trial of Chicago’s Detective Jon Burge. Burge oversaw the torture of more than 100 Black men on Chicago’s South Side. US Attorney Patrick Fitzgerald prosecuted Burge when Illinois prosecutors would not. Despite many good things about Chicago, the periodic corruption of the government and police was not among them.

Annual Review of Criminology, Vol. 8:1-23 . January 2025

By Andrés Aldana, Hernán Larralde & Maximino Aldana

Among all types of corruption, police corruption is probably the one that most directly hurts society, as those trusted with protecting the people either side with the criminals that victimize the citizens, or are themselves, criminals. However, both corruption and its effects are very difficult to measure quantitatively other than by perception surveys, but the perception that citizens have of this phenomenon may be different from reality. Using a simple agent-based model, we analyze the effect on crime rates as a result of both corruption and the perception of corruption within law-enforcement corporations. Our results show a phase transition in which crime can propagate across the population even when the majority of police officers are honest. We find that one of the parameters that strongly controls crime incidence is the probability that regular citizens become criminals. In contrast, other actions, such as arresting crime lords, or the amount of crime-associated money that is confiscated, have little impact on the long-term crime incidence. Our results suggest that in addition to combating corruption within law-enforcement institutions, to further reduce the incidence of crime, policymakers should strive to restore confidence in these institutions and the justice system.

By Laura R. Blume

Why do drug traffickers sometimes decide to use violence, but other times demonstrate restraint? Building on recent work on the politics of drug violence, this article explores how Central American drug trafficking organizations’ strategies impact their use of violence. I argue that three inter-related political factors—corruption, electoral competition, and the politicization of the security apparatus—collectively determine the type of relationship between traffickers and the state that will emerge. That relationship, in turn, determines the primary strategy used by traffickers in that country. Drawing on over two years of comparative ethnographic fieldwork in key transshipment points along the Caribbean coast of Central America, I show how co-optation strategies in Honduras have resulted in high levels of violence, evasion strategies in Costa Rica have produced moderate levels of violence, and collusion strategies in Nicaragua have generated the lowest levels of drug-related violence.

Comparative Political Studies,Volume 55, Issue 8, July 2022, Pages 1366-1402

By Ingrid Diane Johnson

Purpose: How victims of violence against women (VAW) label their experiences and selves can be important for help-seeking, but descriptive research on the prevalence of experience- and self-labels among VAW victims is limited. This study sought to fll some of the gaps in this quantitative literature using new measurement tools. Method: The current study used quantitative survey data from a weighted sample of 1694 community-based women in Alaska who had experienced VAW (determined using behaviorally specific items) to measure the prevalence of a variety of labels these victims could apply to their experiences and selves. Results Generally, victims of specific forms of violence had minimal agreement on the terms they used to label their experiences. The most commonly endorsed label was 28.5% of those who had experienced alcohol or drug involved sexual assault applying the label rape to their experiences. Across all victims, the most commonly endorsed self-label was survivor, with one-quarter to one-third endorsing this label, depending on the subsample. Roughly one-tenth used the self-label victim across all subsamples. Conclusion: VAW service providers should consider labels used to promote services and how to increase awareness about which behaviors constitute VAW; policymakers should improve the accessibility of healthcare so that labeling oneself or one’s experiences in a certain way is not a prerequisite of help-seeking; and researchers should continue exploring how to measure experience- and self-labels with minimal priming of participants and greater specificity to the actual experiences with violence.

Journal of Family Violence (2024) 39:421–433

By Reanna Sanchez

The goal of this process evaluation was to determine how closely the RRC was following evidence-based practices for reentry and to determine how successful the RRC has been transitioning individuals from the jail to the community. To evaluate the effectiveness of the RRC, we (1) conducted a survey of county staff involved in the reentry process (n = 25) to better understand how staff perceive the reentry planning process and the RRC, (2) conducted observations of the intake and screening process at the MDC, and (3) reviewed client records for all inmates who passed through the RRC between 2018 and 2022. We found that there were challenges associated with how the RRC screened, assessed, and targeted individuals for intervention related to a lack of standardization across process components. Surveys collected from staff members provided insight into challenges related to reentry, such as the need for a single case plan to follow the individual through jail and into the community. Finally, analysis of the client-level data illustrated the services and needs of clients. While many individuals (n = 9,985) completed risk needs assessments (RNAs), the number of individuals that completed transition plans (TPs) is far less (n = 2,785). Due to the nature of the different challenges of the current process in place, determining the impact of the RRC on recidivism reduction remains complicated.

Albuquerque: University of New Mexico, Center for Applied Research & Analysis, 2023. 40p.

By  Alex Severson,  Paul Guerin,  Reanna Sanchez, Cris Moore,

This study validates two risk assessments designed to predict inmate misconduct in New Mexico prisons. Using a six-year admission cohort of inmates admitted to New Mexico prisons between 2015 and 2021 (n = 34,2467 unique classification events), we paired focus groups with New Mexico Corrections Department classification staff and observations of the classification process with logistic regression, count models, and random forest models to assess the predictive validity of the New Mexico Corrections Department (NMCD)’s initial and reclassification tools for general and serious, violent misconduct within six months following classification. Results from focus groups and observations highlighted that the NMCD had the essential components of an objective classification system. Our empirical validation found that the reclassification tool was more predictive of misconduct than the initial classification tool for both male and female inmates and generally had good classification performance, though there were limitations with the metric we used for evaluating predictive validity. We also recommended that some factors on the classification tools should be rescored based on their predictive relationship with serious violent misconduct and proposed an updated scoring system based on these relationships (i.e., increasing points for factors which were more predictive of violent misconduct). We also evaluated the relationship between overrides, custody levels, and misconduct.

Albuquerque: University of New Mexico, Center for Applied Research & Analysis, 2024. 70p.

By Alex Severson,  Elise Ferguson

This study evaluates the predictive validity of the Public Safety Assessment (PSA) in Bernalillo County, New Mexico, using data from 22,387 felony cases between July 2017 and June 2023. The PSA, which generates scores predicting defendants' likelihood of failure to appear (FTA), new criminal activity (NCA), and new violent criminal activity (NVCA) during pretrial release, demonstrated "fair" to "good" predictive validity with AUC scores ranging from 0.58-0.69, aligning with results from our initial validation study from June 2021. While the PSA showed similar predictive performance across racial groups for FTA and NCA outcomes, the NVCA flag performed poorly for Black defendants, with predictive validity no better than chance. We also found that age-related risk factors embedded in the NCA and NVCA scales had limited predictive value. We documented significant increases in FTA rates during and after COVID-19, likely due to policy changes that increased court appearances through mandatory status hearings. Despite higher base rates of NCA and NVCA for male defendants, the PSA demonstrated similar predictive validity across genders. Analysis of NCA by charge severity revealed that even high-risk defendants rarely committed serious felonies while on pretrial release. Our findings suggest opportunities to optimize the PSA locally by adjusting how age-related factors are weighted and reconsidering the use of the NVCA flag for Black defendants.

Albuquerque: University of New Mexico, INSTITUTE FOR SOCIAL RESEARCH CENTER FOR APPLIED RESEARCH AND ANALYSIS , 2024. 48p.

By Alex Severson, Reanna Sanchez Chavez, Paul Guerin

This study evaluates the outcomes of the Bernalillo County Community Connections Supportive Housing (CCSH) program, which provides housing and intensive case management services to persistently unhoused individuals with mental illness and substance use disorders who frequently utilize emergency services and the criminal justice system. Using data from 442 CCSH participants enrolled between 2017-2022, we analyzed changes in criminal justice system involvement before and after program enrollment by examining jail bookings and court records. The analysis combined descriptive statistics with logistic regression models to evaluate how program engagement impacted recidivism. Results indicate that participants had significantly fewer bookings into the Metropolitan Detention Center and lower arrest rates in the post-enrollment period compared to pre-enrollment across one, two, and three-year timeframes. Higher doses of case management were associated with reduced odds of recidivism - each additional day (8 hours) of case management received was associated with approximately 7% lower odds of arrest in the year following enrollment. However, this effect faded over longer time periods. Being non-successfully discharged from the program (e.g., due to program noncompliance) was associated with significantly higher odds of recidivism. While our findings suggest potential positive effects of the CCSH program on criminal justice outcomes, our ability to make causal claims is limited by the lack of a control group and incomplete data on post-enrollment periods of incarceration. Future research should examine the program's impact on health system utilization outcomes.

Albuquerque: University of New Mexico, Center for Applied Research & Analysis, 2024. 22p.

By Aaron Lenihan,  Amanda Hauke,  Francisco Sanchez and Paul Guerin,

The Department of Health, Housing, and Homelessness (HHH) launched the Albuquerque Peer to Peer: Opioid Coordination and Outreach Project in September 2017. The project aims to reduce opioid misuse, overdose, and death in the Albuquerque area by using peer support workers to connect individuals suffering from opioid use disorder with appropriate treatment and recovery support services. This report presents the results of CARA’s evaluation of the Peer to Peer project. We review the scientific literature on similar programs to establish a baseline for expected client outcomes and best practices, and then compare the Peer to Peer project to this baseline through an analysis of program documents and service data. The results of our analysis reveal that Albuquerque Peer to Peer is broadly designed and implemented according to best practices. However, we recommend clarifying the procedures for assessing client needs and facilitating client engagement in referred-to services. In terms of the short-term outcome -- proportion of clients who engaged in the treatment services to which they were referred – we found that Albuquerque Peer to Peer is performing as well as comparable, state-of-the-art peer outreach programs. We recommend the project track middle to long-term client outcomes, like rates of EMS involvement and overdose death, moving forward.

Albuquerque: New Mexico Statistical Analysis Center, Institute for Social Research, Center for Applied Research & Analysis, 2023. 40p.

By Robin Joy and Megan Novak

It has been a long-time interest in both the victim advocate community and researchers to conduct a study to determine if individuals living in the rural areas of Vermont experience greater severity of injuries. Isolation in the rural areas creates a challenging barrier for a number of reasons: fewer people are around to witness behaviors, victims are removed from services, higher rates of substance abuse and unemployment, issues with transportation, and long distances to domestic violence and health-related services. According to the Vermont Domestic Violence Homicide Fatality Review Committee, at least half of Vermont’s homicides have been domestic violence-related almost every year since 1994 (Commission, 2020) (Vermont Fatality Review Commission, 2018). Research external to Vermont suggests that the rural nature of the state may be contributing to the homicide rate as well as to the level of injury sustained in intimate partner assaults. A study of services provided to victims in Illinois found that rural victims were more likely to experience sexual assault than urban victims. Logan et. al. (2003 & 2005), found that rural victims of domestic violence are likely to be abused earlier in a relationship and be abused more often than urban victims. Factors that contribute to more injurious intimate partner violence (IPV) in rural areas include isolation from other houses, few employment/housing opportunities, and distance from services and supports (Edwards, 2015). These issues are present in the rural state of Vermont with a longstanding affordable housing crisis, lack of accessible public transportation and services outside of larger population centers, and limited hospital options. Working with stakeholders, this study was designed to understand the impact that Vermont’s rural nature may have on the severity of domestic violence in Vermont. The primary research question proposed for this project was: Do victims of domestic violence in the rural areas of Vermont experience more serious injuries than victims in urban and suburban areas? Breaking this down the project proposed to answer: • Do intimate partner assaults result in more serious injuries in areas where there is no local police coverage versus those areas that have a local police force?

Do Emergency Department visits coded with IDC codes for Domestic Violence1 indicate that there is a difference in the severity of injuries of patients from rural areas versus urban areas? • What distance barriers are present for victims of intimate partner violence in accessing services such as shelter, counseling, and economic services? This study uses various data sources to categorize the injuries sustained by victims by their location and evaluates the data sources available to measure the prevalence of serious injuries in rural areas. Part 1 maps out the resources available to domestic violence victims. Part 2 analyzes the National Incident Based Reporting System (NIBRS) data to understand crimes of IPV reported to the police. Part 3 analyzes emergency room discharge data for domestic violence cases. 

Montepilier, VT: Crime Research Group, 2021. 19p.   

By Robin Joy

Routine Activity Theory, a criminological theory that describes the circumstances in which crime occurs, can be applied to crimes against vulnerable adults and the elderly. Using a variety of data sources this report examines this theory and finds: 1. Vulnerable Adults are more likely to be victimized by someone they know. 2. People charged with violating the Vulnerable Adult statutes have criminal histories that indicate a specialization in criminal activity, compared to those of the general offending population. 3. People charged with violating the Vulnerable Adult statutes are significantly older than the general offending population. 4. Most crimes against the vulnerable and the elderly take place in a private home. 5. The elderly are more likely to be victims of larceny, while the vulnerable adults are more likely to be victims of fraud. Routine Activity Theory can explain the victimization against the vulnerable and elderly. Using this framework, policy makers and stakeholders can begin to create policies and programs that can help keep vulnerable and elderly Vermonters safe.   

Montpelier, VT: Crime Research Group, 2022. 17p.

By Monica Wheeler and Robin Joy

This memo explores drug charge filings and dispositions in the Vermont Superior Court, Criminal Division from 2018 through November 2023. Summary • Heroin filings are down from their pre-pandemic levels. • Cocaine filings and dispositions are rising back to their pre-pandemic levels. • The most common crimes associated with drug charges are public order offenses. • Property crimes are not often associated with drug charges. • Cocaine is the most common drug charged with fentanyl cases, heroin cases, and the catchall depressant/stimulant/narcotic cases.

Montpelier, VT: Crime Research Group, 2024. 18p.

By Robin Joy

This report explores the utility of using Vermont criminal histories to understand probation and parole violations. We conclude that criminal histories alone are not sufficient to understand the dynamics of probation and parole violations. Intensive Department of Corrections (DOC) resources would be needed to better understand the when, where, and what of violations. Methods We used two data sources to identify who was released on probation or parole. For parole releases we used the National Corrections Reporting Program (NCRP) report that is generated by the Vermont Department of Corrections and submitted to the federal government. This report is an offender-level report that captures entries and releases from correctional facilities. We used the reports that captured Federal Fiscal Year data from 2016, 2017, and 2018. We used this dataset to identify people who were released from facilities and therefore might have been placed on parole. We requested their Vermont criminal histories and identified if/when they were released on parole. They became our parole cohort. The probation cohort was generated from the Court Adjudication Database maintained by Crime Research Group (CRG). We selected people who were sentenced to probation or deferred sentences (which is also a probationary sentence) for the probation cohort. We had to exclude people sentenced to a split sentence. A split sentence is a type of sentence that is split between incarceration in a facility and then a subsequent period of time on probation. We did not include these people because we could not accurately identify when someone was released from a correctional facility to probation. In the NCRP data, the release could be the initial release or release from an incarceration due to a probation violation. The criminal histories no longer capture when someone is released on probation. The final cohort for probation, deferred, and parole are described below in Table 1. As is often the case with criminal justice data in Vermont, there were too few people of Asian, Indigenous, and Hispanic descent to provide detailed numbers without the possibility of someone being identified

Montpelier, VT: Crime Research Group, 2022. 9p.

By Monica Weeber and Robin Joy

Summary • The 2023 retail theft charge filings are consistent with pre-COVID years. There is an increase in the number of felony retail theft charges filed. • Most felony retail theft charges are disposed as a felony. • Case backlogs can occur at all stages of the process, including apprehension, scheduling, and disposition. • 57.6% of repeat retail theft offenders re-offend with a new retail theft offense within 30 days of their first offense. • Restitution is ordered in approximately 8% of all retail theft cases.
 

• Straight sentences were the most common sentence for both misdemeanor and felony retail theft. The average minimum time for misdemeanor retail theft was .03 years (11 days) and for felony was .64 years (7.6 months).

Montpelier VT: Crime Research Group, 2024.   12p.

By Megan Novak

Vermont’s victim service providers, law enforcement, and legislature have been interested in understanding state trends related to sex and labor trafficking. In this regard, Crime Research Group reviewed Vermont human trafficking data recorded in the National Incident Based Reporting System (NIBRS). NIBRS was created to capture details on specific crime incidents including information about victims, known offenders, victim-offender relationships, arrestees, and property involved. Since the 1990s, Vermont law enforcement have been NIBRS compliant meaning that information concerning certain crimes known to Vermont law enforcement are logged in NIBRS. This report reviews available NIBRS data reported between 2015-2019. A preliminary review indicated that there were no labor or sex trafficking cases recorded in 2015. Furthermore, between 2016-2019, there were no recorded incidents involving labor trafficking offenses. Therefore, this report focuses on sex trafficking offenses that occurred between 2016-2019 in Vermont. Annual review of NIBRS sex trafficking data will help identify trends and monitor data quality. Trends to be monitored include, but are not limited to, total number of incidents and offenses, offense circumstances (e.g., substances involved, weapons used), as well as victim and offender demographics.

Montpelier, VT: Crime Research Group, 2021. 7p.

By Megan Novak

Domestic violence (DV) refers to a particular subset of offenses committed by household members, spouses (including ex- and common law spouses), children/stepchildren, or family members. While some domestic incidents involve non-violent offenses (e.g., identity theft, forgery, motor vehicle theft), this report focuses on violent offenses (e.g., murder, rape, assault) that occur during domestic incidents. Rather than report crimes as DV, NIBRS requires law enforcement to record the relationship of the victim to the offender. Incidents included in this report can be categorized as intimate partner violence (IPV) (i.e., violent offenses committed against a boyfriend/girlfriend, homosexual partner, spouse, ex-spouse, or common law spouse) and DV against children aged 18 and younger (i.e., violent offenses against a biological child, child of a boyfriend/girlfriend, or a stepchild). Annual reports will monitor trends related to the number of incidents each year, types and number of offenses committed, victim and offender demographics, victim-offender relationships, and arrestee information. 

Montpelier, VT: Crime Research Group, 2021. 9p.

By Megan Novak

Property offenses refer to crimes in which the object is “to obtain money, property, or some other benefit” (NIBRS User Manual, p. 9).1 Between 2015 and 2019, property offenses accounted for 70.88% of all crimes committed in Vermont. Given the prevalence of property offenses, criminal justice stakeholders and legislatures have a vested interest in monitoring trends related to these types of crime. The National Incident Based Reporting System (NIBRS) is a data source in which law enforcement record information about 26 property offenses. Annual reports will monitor Vermont’s NIBRS data for trends related to the number of incidents each year, types and number of offenses committed, victim and offender demographics, and arrestee information. 

Montpelier, VT: Crime Research Group, 2021. 13p.

By Christopher C. Louras 

As part of Crime Research Group’s (CRG) stakeholder engagement process associated with the National Incident Based Reporting System (NIBRS) data-driven Vermont Crime Analysis project, CRG’s law enforcement partners asked: “How do our agencies spend our time? And to what offenses do we respond?” This report seeks to use NIBRS data to help Vermont’s state, county, and municipal policing agencies answer those questions. This report will delve into the most common reported offenses within the state and the individual counties, which law enforcement agencies respond to the reported crimes, and the distribution of the offenses in individual counties. Given that most of Vermont is comprised of rural areas, an aggregate view of the data on offenses committed in the state might be skewed by more urbanized areas like Burlington. As such, this report will examine the top five offenses reported in each county and will include a list of the top ten crimes. A county-level examination can help inform how law enforcement agencies and policymakers develop strategies to address each jurisdiction’s particular needs. This report by no means describes all the incidents to which law enforcement responds. NIBRS data captures crimes while quality of life incidents such as noise complaints, issues with animals, and suspicious activity, etc., are not captured in NIBRS data. Once Vermont law enforcement are all using the new computer aided dispatch/records management system (CAD/RMS), the quality-of-life incidents will be available for a more comprehensive review as to how law enforcement spends their time.

Montpelier, VT: Crime Research Group, 2021. 33p.