By Tamara Stotz, Angela Bearth, Signe Maria Ghelfi & Michael Siegrist

Due to the increasing number of passengers at airports, regular security checks reached their capacity limits. Thus, alternative security checks are being discussed to increase their efficiency. For example, instead of screening all passengers briefly, a randomly selected sample of passengers could be screened thoroughly. However, such randomization-based security checks could be perceived as less secure based on the assumption that fewer illegal objects would be uncovered than through regular security checks. To analyze whether this is the case, we conducted an online experiment that investigated people’s perceptions of and preference for traditional and randomization-based security checks from both the passenger and the criminal perspectives. The findings suggest that within security checks with explicitly stated equal probabilities of detecting illegal objects, passengers do not exhibit strong preferences for either the traditional or the randomization-based security checks. However, randomization-based security checks would be preferred by criminals. Thus, with regard to security, the status quo, namely traditional security checks, is still the best way to keep airports secure.

Journal of Risk Research, Volume 24, 2021 - Issue 12

By Rasmus Munksgaard, Kim Moeller & Theresa Dyrvig Henriksen

Sex workers in Europe are increasingly of nonnational origin. The Schengen cooperation allows internal migration within the European Union, but many migrant sex workers originate from outside the EU. While sex workers are already in precarious positions, nonnationals risk deportation, dependent on their citizenship status, and may have debts to smugglers. Consequently, they may be more likely to work longer hours to increase short-term profits. Using a dataset of sex work advertisements from one Danish website (n = 2,594), we estimate the association between inferred citizenship status and a) advertised hours on shift using ordinary least squares regression, and b) the probability of advertising 24/7 availability using a linear probability model. Compared to Danish sex workers, we find migrants advertise almost twice as many hours on shift and are more likely to advertise 24/7 availability. These results shed light on the inequalities that persist between national and nonnational sex workers.

Global Crime, Volume 26, 2025 - Issue 1

By Giulia Berlusconi

This paper investigates the impact of the targeting of key players by law enforcement on the structure, communication strategies, and activities of a drug trafficking network. Data are extracted from judicial court documents. The unique nature of the investigation – which saw a key player being arrested mid-investigation but police monitoring continuing for another year – allows to compare the network before and after targeting. This paper combines a quantitative element where network statistics and exponential random graph models are used to describe and explain structural changes over time, and a qualitative element where the content of wiretapped conversations is analysed. After law enforcement targeting, network members favoured security over efficiency, although criminal collaboration continued after the arrest of the key player. This paper contributes to the growing literature on the efficiency-security trade-off in criminal networks, and discusses policy implications for repressive policies in illegal drug markets.

Global Crime, Volume 23, 2022 - Issue 1

By Matthew Edwards,Jack Mark Whittaker, Cassandra Cross & Mark Button

The internet has revolutionised retail sales, with online shopping a common practice globally. While convenient, offenders have also embraced the opportunity to target potential victims and their shopping carts. Online shopping fraud occurs when offenders represent themselves as legitimate online sellers to gain sales from unsuspecting victims, both by impersonating genuine retailers and creating fictional retailers with non-existent products. The current article explores the victimisation and near misses of consumers to online shopping fraud. Based on survey responses of 1011 Australians, the article examines the online shopping activities of individuals as well as any victimisation or near miss experiences. The results indicate a high level of victimisation and near misses across this sample. It further examines a range of impacts experienced by these consumers and considers the implications of these results for the retail sector and prevention practices into the future.

 Global Crime, 26(1), 69–89.

By Noga Shanee, Amnon Keren, Evelyn D. Anca, Tamar Fredman, Omer Polansky & Yael Cohen Paran

There are certain biases that characterize the global efforts to tackle wildlife crime, restricting their effectiveness. Firstly, wildlife crime is considered mainly a problem of developing source countries, while the role of developed consumer countries is largely ignored. Secondly, illegal trafficking and legal wildlife trade are treated separately, while the first is considered harmful to the environment and the latter is often considered tolerable, and even a conservational tool. In this study, we use the case study of Israel, a small, developed country with a solid legal framework to control the illegal wildlife trade. For the period between 2021 and 2023 we reviewed national and international laws and regulations from different sectors relevant to wildlife law enforcement. We monitored social media, online commerce platforms and instant messaging groups in order to assess online trade, and interacted with the wildlife authorities to assess their responses. We found six overarching legal themes: (1) species permitted for trade and possession; (2) trade and possession permits; (3) health permits; (4) animal welfare laws and regulations; (5) wildlife shows; and (6) general commerce and money laundering laws. Our results demonstrate that although there is a regulatory infrastructure which allows legal wildlife trade, the vast majority of the trade violates at least some of the related laws and standards. We also found biases in the authorities’ readiness to tackle different types of wildlife crime. Therefore, this study challenges the false dichotomy between legal and illegal wildlife trade and calls for further research and improved enforcement and control of authorized wildlife trade in developed countries.

Journal of International Wildlife Law & Policy, Volume 28, 2025 - Issue 1

By Fritz Brugger, Joschka J. Proksik & Felicitas Fischer

Most research on illicit financial flows (IFFs) has focused on illicit outflows from low-income countries and the role of non-state actors in generating IFFs. Less attention has been paid to processes through which IFFs enter formal value chains – in effect being legalised before leaving the country – or the crucial role of state institutions as gatekeepers. We develop a novel explanatory approach to account for the enabling role of state institutions in the legalisation of IFFs. Building on political settlement theory, we explain the performance of institutions in regulating IFFs as a function to maintain political power. Taking the case of Bolivia, we examine how legalising illicit value flows works in practice and analyse the motives and underlying conditions that lead state institutions to permit the formal export of gold shipments that have been illicitly sourced or transferred. We find that the legalisation of IFFs accommodates the interests of powerful cooperatives dominating the gold-mining sector, which are critical to maintaining the political settlement on which the incumbent government’s power is based. By maintaining a status quo of non-enforcement, legal ambiguity, and informality, gold-mining cooperatives reap higher benefits from resource extraction at the expense of domestic revenue mobilisation.

New Political Economy, Volume 29, 2024 - Issue 4

By Caroline Shubel , Mary Ava Nunnery , Grace Marley, Bayla Ostrach , Delesha M. Carpenter

Background: Methadone, an evidence-based medication for opioid use disorder (MOUD), is available through prescription at community pharmacies in countries like Canada, Australia, and the United Kingdom, but not in the United States (U.S.). The objective of this scoping review was to summarize barriers and facilitators related to dispensing methadone in community pharmacies to inform future implementation efforts in the U.S. Methods: A scoping review was conducted using PubMed, Embase, SCOPUS, and CINAHL. Original research articles related to barriers and/or facilitators around community pharmacy-based methadone dispensing were included. No search limits (year of publication, geographic boundaries) were applied to the search strategy. Two independent researchers screened all articles for eligibility, extracted data, and met to reach consensus. Data were extracted on 12 items, with a particular focus on barriers and facilitators to dispensing methadone in community pharmacies. Results: Forty-one articles were included in the review. The most common barriers to methadone dispensing were workload (n = 14), safety concerns for staff and property (n = 13), concern about patient behavior and interactions (n = 12), financial hardship (for pharmacists and patients) (n = 11), and stigma and discrimination towards patients (n = 11). The most common facilitators were pharmacist training and education (n = 14), positive pharmacist-patient relationships (n = 14), and privacy (n = 10). Conclusions: The findings from this review can be used to address barriers and incorporate known facilitators into future protocols or practice of pharmacy-based methadone dispensing. Further research is needed to identify U.S. and state-specific anticipated needs for pharmacy-based methadone dispensing

:Drug Alcohol Depend Rep. 2026 Jan 29;18:100413. doi: 10.1016/j.dadr.2026.100413. PMID: 41695144; PMCID: PMC12906019

Bt Hope M. Smiley-McDonald,  Esther O. Chung , Lynn D. Wenger, Danielle Good , Gillian Leichtling c, Barrot H. Lambdin , Alex H. Kral 

Background

In 2020, the U.S. state of Oregon passed Measure 110 (M110), which aimed to address substance use disorder as a public health issue and reduce disparities in the criminal legal system by decriminalizing personal drug possession and increasing services. The impact of partial drug decriminalization on individuals under community supervision—whose release conditions often prohibit drug use and who M110 excluded—is understudied.

Methods

We used targeted sampling to recruit and survey people who use drugs (PWUD; N=468) in eight Oregon counties in 2023. We compared PWUD under community supervision to those who were not to assess opioid-related overdose, naloxone access, and law enforcement engagement.

Results

Compared to PWUD who were not under community supervision, those under supervision had higher prevalence of past year opioid-related overdose. There were no differences by naloxone access. Eighty-two percent (82%) of PWUD on community supervision were stopped by law enforcement in the past year. PWUD on community supervision were more likely than those not on community supervision to report in the past year being searched by law enforcement at least once (adjusted prevalence differences [APD]=0.33; 95% CI: 0.23, 0.43), spent time in jail at least once (APD=0.33; 95% CI: 0.23, 0.43), and to have concerns about getting into trouble if they called 911 for a drug-related health problem (APD=0.12; 95% CI: 0.00, 0.18).

Conclusion

Under M110, Oregon PWUD experienced more police engagement and overdoses. Findings have implications for less police presence at overdose scenes, greater access to naloxone and support services, and protections under future decriminalization laws.

Drug and Alcohol Dependence Reports

Available online 15 March 2026, 100430

In Press, Journal Pre-proof

By Matthew F. Garnett, Jodi A. Cisewski, Farida B. Ahmad

Objective:

This report identifies the specific drugs most frequently involved in drug overdose deaths in the United States from 2017 through 2023.

Methods:

Data from the 2017–2023 National Vital Statistics System mortality files were linked to literal text data from death certificates. Drug overdose deaths were identified using the International Classification of Diseases, 10th Revision underlying cause-of-death codes X40–X44, X60–X64, X85, and Y10–Y14. Specific drugs were identified by searching three literal text fields of the death certificate: the causes of death from Part I, significant conditions contributing to death from Part II, and the description of how the injury occurred. Contextual information was used to determine drug involvement in the death. Descriptive statistics were calculated for the most frequently mentioned drugs involved in drug overdose deaths. Deaths involving multiple drugs were counted in all relevant drug categories.

Results:

Among drug overdose deaths with mention of at least one specific drug, the most frequently mentioned drugs during 2017–2023 included: fentanyl, heroin, oxycodone, morphine, methadone, hydrocodone, alprazolam, diphenhydramine, cocaine, methamphetamine, amphetamine, gabapentin, and xylazine. Fentanyl ranked first across all years and was the most common concomitant drug found with other top drugs, ranging from 99.0% of xylazine-involved drug overdose deaths to 48.3% of oxycodone-involved drug overdose deaths. Cocaine and methamphetamine were also frequent concomitant drugs. Trends in age-adjusted rates across the 2017 to 2023 period varied by drug, but notably the rate for heroin-involved deaths sharply declined, while the rate for fentanyl-involved deaths increased and then stabilized between 2022 and 2023. In 2023, the most frequently mentioned drugs in unintentional drug overdose deaths were fentanyl, methamphetamine, and cocaine, while the most frequently mentioned drugs for suicide-related drug overdoses were diphenhydramine, oxycodone, and bupropion.

Conclusions:

This report identifies patterns in the specific drugs most frequently involved in drug overdose deaths from 2017 through 2023.National Vital Statistics Reports; CDC National Center for Health Statistics; 2026.

By lBenedikt Fischer,  Didier Jutras-Aswad, Bernard Le Foll, Daniel T. Myra

Highlights

•

The province of British Columbia (Canada) temporarily implemented a decriminalization initiative for personal drug possession/use (2023–2024) in contexts of a toxic drug death crisis.

1. •

   The decriminalization initiative was a priori promoted as a “tool to end the overdose crisis” and widely expected to reduce adverse health outcomes from toxic drug use.

2. •

   Emerging evaluation data indicate that the drug decriminalization initiative was not associated with population-level changes in drug use-related mortality (e.g., overdose deaths) or morbidity (e.g., hospitalizations).

3. •

   Drug use decriminalization remains an essential step to align prohibition-based drug policy frameworks with public health and human rights principles, but must be approached realistically and designed sensibly.

4. •

   To tangibly address toxic drug use-related harms, expanded measures are required that are effectively capable of preventing and reducing PWUDs’ exposure to and use of toxic drugs
   International Journal of Drug Policy

Volume 150, April 2026, 105181

By the U.K.Ministry of Justice, and the Office of Health Improvement and Disparities

Executive Summary This report presents follow-up analysis building on Pathways between probation and addiction treatment in England: report - GOV.UK focusing on people sentenced to community orders (COs) and suspended sentence orders (SSOs) with an Alcohol Treatment Requirement (ATR) or Drug Rehabilitation Requirement (DRR). It examines engagement with alcohol and drug treatment, how engagement relates to reconvictions https://www.sciencedirect.com/science/article/pii/S0955395926000332 outcomes, and their characteristics. The analysis covers all ATRs and DRRs issued between August 2018 and March 2023. The study linked probation case management records with the National Drug Treatment Monitoring System (NDTMS) using probabilistic data linkage. This was supplemented by Natural Language Processing (NLP) analysis of probation contact notes. This approach aimed to assess whether the absence of ATRs and DRRs in structured treatment data reflected a true lack of treatment or gaps in data linkage. A total of 45,943 ATR and DRR requirements were issued during the period. Of these, 22,636 were linked to structured treatment through data linkage. The NLP approach derived an engagement rate from the unlinked sample. This was then applied to all unlinked records, resulting in an estimated 18,712 requirements with evidence of treatment engagement. Key Findings 1. Up to 90%1 of ATRs and DRRs were estimated to involve some form of treatment engagement. This is based on 49% linked to structured treatment through probabilistic data linking and an additional 41% of unlinked records showing treatment engagement in probation contact notes. Engagement was estimated to be higher for ATRs (93%) than for DRRs (88%). 2. Reconviction was less common following ATRs and DRRs linked to structured treatment. Within 12 months of sentencing, 36% of those linked to structured treatment were reconvicted, compared with 44% of those not linked to structured treatment. 

3. Characteristics associated with being more likely to be linked to structured treatment included being: • aged over 50 • female • in settled accommodation, (least likely when associated with rough sleeping) • engaged by treatment services within: 

▪ 3 weeks of an ATR, ▪ 3–6 weeks of a DRR 4. Reconviction outcomes varied by treatment outcome: • Reconvictions associated with ATRs and DRRs were lowest when they remained in structured treatment at the end of the observation period (13% for ATR; 26% for DRR). • Reconvictions associated with ATRs and DRRs were highest when they dropped out of structured treatment (41% for ATR; 60% for DRR). • Reconvictions associated with ATRs and DRRs that were not identified in structured treatment were higher than completed or remained in structured treatment but lower than those that dropped out of structured treatment (37% for ATR; 51% for DRR). Conclusion The analysis shows clear associations between treatment engagement and both individual characteristics and justice system factors. Individuals with ATRs and DRRs who completed or remained in structured treatment had better reconviction outcomes than those who dropped out of or had no identified structured treatment. This highlights the value of sustained engagement. The report also demonstrates the value of AI based NLP methods to strengthen insight by identifying treatment activity not captured through data linkage alone.

London: U.K. Ministry of Justice and the Office of Health Improvement and Disparities, 2026. 47p.

By David Spencer

A new report from Policy Exchange demonstrates how London is in the grip of a street crime epidemic and makes seventeen recommendations to show how the Metropolitan Police, City Hall and the Government can turn the tide.  

The report shows that:

• Knife crime in London increased by 58.5% in only three years between 2021 and 2024;

• Only 1 in 20 robberies and 1 in 170 “theft person” crimes in the capital were solved last year.

• 60% of the knife crimes committed in the capital were robberies – with over 81,000 mobile phones stolen in robberies and thefts last year.

• In 2024 one small geographic area of around 20 streets in London’s West End near Oxford Circus and Regent Street had more knife crime than nearly 15% of the rest capital combined; in 2023 these streets had more knife crime than 23% of the capital combined.

 The report identifies the top 20 neighbourhoods (technically known as Lower Layer Super Output Areas or LSOAs of about 15-20 streets each) in London which had the highest levels of knife crime in 2024. One in 15 of every knife crime offence in the capital in 2024 occurred in one of these 20 neighbourhoods (908 knife crimes). In 2024 only 4% of neighbourhoods accounted for nearly a quarter of all knife crime offences in the capital (3,615 knife crimes) and 15% of neighbourhoods accounted for half of all knife crime offences (7055 knife crimes).

The report identifies that within the Metropolitan Police there are least 850 police officers currently in non-frontline posts which could be redeployed to the policing frontline to tackle knife crime, robbery and theft in the areas where criminals are most prolific. This includes police officers currently posted to the following departments: Transformation (142 officers), Human Resources (24 officers), Culture, Diversity and Inclusion (20 officers) and Digital, Data & Technology (34 officers).  

Policy Exchange rejects the suggestion that stop and search is being deployed in a “racist” way. While only 39.5% of those stopped and searched by the police are black, 43.6% of those charged with murder are black, 45.6% of non-domestic knife-crime murder victims are black and 48.6% of robbery suspects are black. 13.5% of London’s population are black. Policy Exchange asserts that it is not “racist” when the police are merely responding to the demographic breakdown of serious and violent offending in the capital.  

Policy Exchange analysis shows that the courts are taking a dangerously lax approach to the most prolific criminals. Despite already having 46 or more previous convictions, “Hyper-Prolific Offenders” are sent to prison on less than half of all occasions (44.5%) on conviction for a further indictable or either-way offence – 4,555 such criminals walked free from court in 2024. For “Super-Prolific Offenders” (those with 26 to 45 previous offences) this falls to 42.1% with 9,483 such criminals walking free from court in 2024. Despite there being mandatory sentencing provisions for repeat knife-carriers to be sent to prison over a third are not sentenced to a term of immediate custody

By Tinenenji Banda and Marja Hinfelaar

Zambia is a significant source of critical minerals including copper, cobalt, lithium, nickel and graphite. Interest in Zambia’s minerals is growing, particularly from Western countries and China. Unfortunately, due to governance weaknesses, there is ample corruption and illicit financial flows at several transaction levels in the value chain. This U4 Issue therefore identifies government interventions Zambia can use to curtail corruption considering existing political pressures.

Main points

• Intense competition for critical mineral value chains results in an increased risk of revenue leakage due to corruption and tax evasion. Illicit financial flows (IFF) threaten Zambia’s economic development and undermine its fiscal systems.

• Zambia has formal commitments in place, such as laws, regulatory institutions and international commitments, to battle corruption and IFFs, but the institutional architecture is fragmented and inadequately enforced. Inter-agency collaboration is required to address these challenges.

• Through a literature review, including a law and policy review, and a stakeholder mapping exercise with 21 key informant interviews with government, civil society, academic and industry representatives, we constructed a qualitative understanding of the key risk factors for corruption and IFFs.

• Significant factors are the lack of a transparent, coherent and disciplined mining licensing system; a non-transparent bidding process; public-private collusion across value chains; abuse of intermediaries and agents; and weak regulation in the sector.

• Opportunities for interventions are enhanced systems for disclosure and due diligence, reform of the Mining Cadastre, support for evidence-based policymaking, support for the organisation of the artisanal mining sector, enhanced quality of civil society organisation public discourse, and enhanced collaboration in anti-corruption agencies, while keeping political pressures in mind.

By Naomi Roht-Arriaza

Courts in several jurisdictions have recognised corruption as a direct human rights violation, enabling broader legal standing, integrating international law and focusing on victims. Case studies, predominantly from Latin America, illustrate different legal theories used to hold officials accountable and expand access to justice in anti-corruption proceedings. Consequently, the formulation of a stand-alone right has merit despite limitations.

By ECLAC

The purpose of the Femicidal Violence in Figures Bulletin is to disseminate data on femicide/feminicide or gender-related killings of women in Latin America and the Caribbean, and to report on the methodological advances made by national institutions in generating statistics on this form of violence. Responsible entities:  Gender Equality Observatory for Latin America and the Caribbean of the Economic Commission for Latin America and the Caribbean (ECLAC) and the UNiTE to End Violence against Women campaign.

By Laurie Caron, Frank Crispino and Cyril Muehlethaler

Tobacco smuggling remains a widespread illegal activity in Canada, associated with important social and economic impacts, and often linked to organized crime. This study explores the application of forensic profiling as an intelligence tool to support the analysis of contraband cigarette production and distribution. Physical and chemical manufacturing characteristics of seized contraband cigarette packs, provided by the Canada Border Services Agency (CBSA), were observed and coded using macroscopic, microscopic, and spectroscopic techniques. Multivariate statistical analyses were then conducted to compare manufacturing characteristics between packs and identify potential links. The analyses highlighted links between cigarette packs and seizures based on shared manufacturing characteristics. The results and the identified groups were also compared with seizure data provided by the CBSA. The results demonstrate the relevance of forensic profiling to formulate hypotheses regarding shared production processes or supply networks. These hypotheses provide information that contributes to understanding tobacco smuggling and aim to examine how forensic intelligence can support law enforcement and measures to prevent and disrupt this criminal activity. A preliminary optimal procedure for applying forensic profiling in operational contexts targeting contraband tobacco was finally proposed. Despite limitations in the dataset creation that were beyond our control, this study represents a starting point for applying this scientific approach to tobacco smuggling

By Dan Anderberg. Line Hjorth Andersen,  N.Meltem Daysal, Mette Ejrnæs

We examine the impact of a 2002 Danish parental leave reform on intimate partner violence (IPV) using administrative data on assault-related hospital contacts. Using a regression discontinuity design, we show that extending fully paid leave increased mothers’ leave-taking and substantially reduced IPV, with effects concentrated among less-educated women. The reform also lengthened birth spacing, while separations remained unchanged and earnings effects were modest. The timing and heterogeneity of impacts point to fertility adjustments—rather than exit options or financial relief—as the key mechanism. Parental leave policy thus emerges as an underexplored lever for reducing IPV.

By

Sara Valdebenito, Hannah Gaffney, Maria Jose Arosemena-Burbano, Sydney Hitchcock, Darrick Jolliffe, Alex Sutherland

School exclusion—commonly referred to as suspension—is a disciplinary response employed by school authorities to address student misbehaviour. Typically, it involves temporary removal from regular teaching or, in more serious cases, complete removal from the school premises. A substantial body of research has associated exclusion with adverse developmental outcomes. In response, various school-based interventions have been developed to reduce exclusion rates. While some programmes have shown promising effects, the evidence on their effectiveness remains inconclusive. This mixed-methods systematic review and multi-level meta-analysis updates the previous review by Valdebenito et al. (2018), which included literature published between 1980 and 2015. The present update extends the evidence base by including studies until 2022. The primary aim of this review was to assess the effectiveness of school-based interventions in reducing disciplinary exclusions, with secondary aims focused on related behavioural outcomes including conduct problems, delinquency, and substance use. Systematic searches conducted between November and December 2022 yielded over 11,000 references for quantitative studies. Following title and abstract screening, 777 records were reviewed at full text by two independent coders. Thirty-two studies met the inclusion criteria for meta-analysis, comprising 2765 effect sizes from 67 primary evaluations (1980–2022) and representing approximately 394,242 students. Meta-analysis was conducted using a multilevel random-effects model with robust variance estimation to account for the nested structure of the data. Quantitative impact evaluations were eligible if they used a randomised controlled or quasi-experimental design, included both a control group and pre/post-test data, and used statistical methods to minimise selection bias (e.g., propensity score matching or matched cohort design). Studies were excluded if they exhibited substantial baseline differences between treatment and control groups. The qualitative synthesis explored implementation barriers and facilitators based on nine UK-based process evaluations, identified through searches completed in September 2023. Process evaluations were included if they focused on the perceptions of stakeholders—teachers, students, or school leadership—within UK schools. Data collection followed two stages: initial selection based on titles, abstracts, and keywords, followed by full-text review. Two independent coders applied inclusion criteria, extracted data, and resolved discrepancies with the principal investigators. All steps were documented to inform the PRISMA flow chart. To evaluate interventions reducing school exclusions, we conducted a multilevel meta-analysis using robust variance estimation. We explored heterogeneity via meta-regression (e.g., gender, intervention type), conducted sensitivity analyses for outliers and correlation structures, and assessed quality data using the EPOC, ROBIN-I and CASP checklist for methodological quality. Findings indicated that school-based interventions were associated with a small but statistically significant reduction in school exclusion (standardised mean difference [SMD] = 0.104; 95% CI: 0.04 to 0.17; p < 0.001). Compared with the original 2018 review, which reported a slightly larger effect size, this update benefits from a broader evidence base and more advanced statistical modelling. However, the results for secondary behavioural outcomes were more limited: effects on conduct problems and delinquency were negligible or non-significant, and the impact on substance use was small and not statistically significant. Risk of bias was assessed using the Cochrane EPOC 2 tool (Higgins and Green 2011) for randomised controlled trials and ROBINS-I (Sterne et al. 2016) for quasi-experimental designs. Randomised studies generally exhibited lower risk of bias, while quasi-experimental studies showed greater variability in quality. Four major themes emerged from the analysis. First, intervention format mattered: flexible, collaborative, and well-structured interventions facilitated implementation, while outdated materials or content misaligned with local context impeded delivery. Second, consistency in school policies and practice enabled smoother implementation, whereas inconsistency acted as a barrier. Third, staff buy-in—particularly among senior leaders—was essential for successful implementation, although resistance from more experienced staff was noted. Finally, perceived effectiveness played a motivational role: visible improvements in pupil behaviour supported continued engagement with the intervention. In summary, the updated review finds that school-based interventions can modestly but significantly reduce school exclusions. While more serious disciplinary sanctions such as permanent exclusions and out-of-school suspensions appear less responsive, in-school exclusion shows greater potential for reduction. Impacts on other behavioural outcomes remain limited. These findings suggest that targeted, context-sensitive interventions supported by strong implementation strategies and whole-school engagement are most likely to achieve sustained reductions in school exclusion.

By D.J. Summers

in the past five years, Colorado’s largest cities have had very different experiences of crime.

Colorado’s violent and property crime rates rose sharply in the early 2020s, prompting varying responses from leaders at state and local levels. Some have been more successful than others, according to the most recently available Colorado Bureau of Investigation data.

CSI analyzed the violent and property crime trends of Colorado’s ten largest cities: Denver, Colorado Springs, Aurora, Fort Collins, Lakewood, Thornton, Arvada, Westminster, Pueblo, and Centennial. These ten cities represent just under half the state’s total population, with a combined population of roughly 2.3 million residents. CSI analyzed the average violent and property crime rates per 100,000 people through the first two quarters of each year between 2016 and 2025. Pueblo’s police data is not current and could not be included in the analysis.

Property and violent crime cost the state $27 billion in economic losses in 2022 between the tangible and intangible effects of reported and unreported crime. It is imperative that public leaders continually examine and understand which policies best address crime rates.

Key Findings

Denver’s violent crime rate is the highest among Colorado’s largest cities, with 235 violent crimes per 100,000 people.

 Aurora’s is second highest, with 203 violent crimes per 100,000 people.

Aurora’s violent crime has remained beneath Denver’s for three years, breaking the trend of the late 2010s and early 2020s in which Aurora’s rates were higher.

Only Colorado Springs saw an increase in the violent crime rate between 2022 and 2025.

Among the largest cities, Aurora saw the sharpest decrease in violent crime rate.

Aurora saw the second highest decrease in violent crime rate, with a 36% decrease.

Denver has the highest property crime rate of Colorado’s largest cities, with 1,122 property crimes per 100,000 people.

Lakewood has the second highest rate, with 1,099 per 100,000 people.

Aurora and Centennial had the sharpest decreases in property crime rate since 2021, at 56%, 49%, and 44%, respectively. 

By Sarah Picard, Leah Nelson, Rae Walker, Kasey Eickmeyer, and Ellie Wilson

Every year, courts across the United States impose millions of dollars in fines, fees, and restitution on people convicted of traffic violations, misdemeanors, and felonies. Collectively, monetary sanctions and other criminal justice fees are referred to as legal financial obligations or simply court debt. Ostensibly, court debt is intended to sanction offenders, recover the costs of running a court system, raise revenue, and compensate victims of crime. In most jurisdictions, however, court debt is assessed without considering an individual’s ability to pay, and much of what is owed goes uncollected. Estimates suggest that there are approximately $27.6 billion in outstanding obligations. In addition to being an unreliable source of revenue, court debt can have severe and long-standing consequences for those who owe, exposing them to increasing debt, future incarceration related to unpaid debt, and the suspension of voting rights, among other collateral consequences. In jurisdictions across the country, court debt also has a disproportionate effect on the economically disadvantaged, as well as Black and Latino individuals and communities. Many of the equity and collateral consequences described above hold true for court debt assessment and collection in Jefferson County and across Alabama, as documented in a 2018 survey with over 800 Alabama residents who owed court debt. This research attracted the attention of judges in the Tenth Circuit Court in Jefferson County (home to Birmingham) who worked with Leah Nelson, lead researcher on the 2018 survey, and MDRC to develop the Jefferson County Equitable Fines and Fees (JEFF) Project, a multidisciplinary study of the scope and consequences of court debt in the county. With funding from Arnold Ventures, the JEFF Project began in 2022. The findings in this report reflect multiple lines of inquiry, including descriptive and inferential analyses of five years of case-level court data, in-depth interviews with court practitioners, and focus group discussions with individuals who have direct experience with court debt in Jefferson County. Taken together, these analyses point to a system that is neither effective in generating revenue for the court, nor fair, given its outsized impact on Black and indigent people living in poor communities. Over the five years of the study, just under half of the individuals who owed court debt paid in full, with many seeing their debt burden grow over time. The research team also isolated some of the major factors that contribute to debt growth, which include race and economic disadvantage, in addition to factors related to how debt is collected, most notably the practice of assessing a 30 percent late fee on those who do not submit a payment within 90 days. Both court practitioners and individuals who are directly affected viewed the current system as broken, with the latter describing serious financial, emotional, and collateral consequences. Findings from the JEFF Project have already prompted the reconsideration of current practices in Jefferson County, including a pilot project to reduce debt burdens and encourage payments, and the creation of a statewide task force that will examine fines and fees across Alabama. Finally, given that Jefferson County is home to a midsized  city situated in a fiscally and socially conservative state, its social and geographic characteristics make it a useful reference for many cities and counties looking to make changes in their fines and fees systems.