By Julia Korkman

Traffickers often use manipulation to tie their victims with what is sometimes called “invisible chains”. These, often subtle and large ly psychological means of controlling and manipulating victims are hard to detect and prove by the criminal justice system. The terms used for this phenomenon in the scientific literature are psychological coercion, psychological control and coercive control. IN THIS POLICY brief, we use the term psychological coercion, as it is widely used in the human trafficking literature. This policy brief pro vides a brief insight into psychological coercion as a phenomenon, what is known about the use of such coercion in the context of trafficking in human beings and how investigators can strive to address the issue of psychological coercion within criminal investigation

Helsinki: HEUNI, 2023. 4p.

By The Little Hoover Commision

California must improve and expand efforts to identify labor trafficking, the state’s independent government watchdog recommends in a new report.

In Labor Trafficking: Strategies to Uncover this Hidden Crime, the Little Hoover Commission calls for increased efforts to identify labor trafficking through better training, data collection, and public awareness. This is the Commission’s second report studying California’s response to human trafficking and builds upon the recommendation from its first report on the topic, released in June 2020, to create a statewide Anti-Human Trafficking Council.

“Too often, this heinous crime goes undetected, and those who have been preyed upon have nowhere to turn,” said Commission Chair Pedro Nava. “This horrible crime demands an aggressive response, and our recommendations will help California do just that.”

Labor trafficking occurs when employers use force, fraud or coercion to exert a level of control over workers that leaves them trapped in oppressive situations. It can occur in a variety of workplaces, including restaurants, construction sites, farm fields, and households, and is often very difficult to detect. Widespread unemployment due to the COVID-19 pandemic may contribute to the conditions necessary for labor trafficking to flourish.

The Commission’s report focuses on the obstacles that make it difficult to identify labor trafficking, including a lack of enforcement of anti-trafficking laws and a lack of familiarity about the issue among government officials and the public. The report also notes that the state’s primary focus has been on combatting sex trafficking, a focus that must continue but be expanded to include labor trafficking as well.

“We need to know where labor trafficking is occurring in California and who is being affected so we can direct resources to help victims and bring traffickers to justice,” explained Commissioner Cynthia Buiza, chair of the Commission’s subcommittee for the labor trafficking studies. “More information will mean a stronger state response.”

The report also notes the strides taken by state officials to combat and deter child sex trafficking and calls for similar investment in protections for child victims of labor trafficking.

“It is crucial that all children are protected,” said Commissioner Dion Aroner, a member of the study’s subcommittee. “Nothing is more important than ensuring that California’s youngest and most vulnerable residents do not fall prey to the evil of human trafficking.”

Report #251, September 2020; Sacramento: Little Hoover Commission, 2020. 30p.

By The Little Hoover Commission

The Commission assessed California’s efforts to combat labor trafficking in 2020 and produced three reports that included recommendations to strengthen the state’s stance against this horrific crime. Together, in these reports, the Commission offers recommendations to help California coordinate its response to human trafficking, detect labor trafficking, help victims, and bring traffickers to justice. In 2023, the Commission held a public hearing and sought additional input from five state agencies to learn about progress made towards implementing its recommendations. As part of this follow-up review, the Commission found a growing need for support of labor trafficking survivors. Yet, barriers—such as insufficient resources to identify and prosecute this crime—continue to undermine the state’s efforts. These challenges are exacerbated by gaps in state and local leadership that hinder continuity of effort in anti-trafficking work. Coordinating Leadership Around Anti-Trafficking Activities In its initial study, the Commission found that California’s response to human trafficking focuses principally on combatting sex trafficking. Additionally, the state lacks a coordinated strategy to target human trafficking statewide. In its report, Human Trafficking: Coordinating a California Response, the Commission recommended the creation of an antihuman trafficking council to build and enhance collaboration among communities throughout the state, study and improve services for survivors of both sex and labor trafficking, and assist in the successful prosecution of human traffickers. While there have been several legislative attempts to create such a coordinating body, none have been successful thus far. Nonetheless, representatives from regional human trafficking task forces told the Commission that such an entity would elevate trafficking as an explicit statewide priority, help them to implement strategies to identify labor trafficking, share best practices, and access published case law. California must institutionalize its response to human trafficking through the creation of a state-level centralized hub. Uncovering Labor Trafficking Combatting labor trafficking within California must begin with effectively detecting this crime— whenever and wherever it occurs. Yet, uncovering labor trafficking can be particularly challenging, as few understand the nature of the crime and to the untrained observer, the work itself may appear legitimate. In its report, Labor Trafficking: Strategies to Uncover this Hidden Crime, the Commission identified several strategies to help California better detect labor trafficking, including through increased worker training, public education and outreach, and equal application of statutory protections to help identify and address all forms of child trafficking. In its review, the Commission found some efforts to improve identification of this crime, such as periodic training on labor trafficking for certain public officials and workers, increased public awareness resources, and legislative attempts to equally address all forms of child human trafficking. While important, these efforts do not meet the scale or scope envisioned by the Commission in its original study. California must expand upon this work to have a chance at significantly reducing labor trafficking. In this report, the Commission reiterates a few such opportunities, including regular and robust support to train public officials to serve as “first identifiers,” expanded worker training opportunities and informational campaigns across industry sectors, and statutory amendments to ensure equal protection against all forms of trafficking.

Report #278; Sacramento: Little Hoover Commision, 2024. 25p.

By Jessica Reichert and Maryann Mason

In the United States, firearm homicide is a major public health concern. Certain populations are at greater risk for being a victim of firearm homicide, such as those with prior criminal justice involvement. The overlap between violent victimization and offense history, referred to as the victim-offender overlap, is empirically supported, but research is limited on the overlap of firearm homicide victimization and justice involvement. Therefore, we examined the extent of victim-offender overlap of firearm homicide decedents by matching Illinois public health data with state arrest data. A total of 1,331 firearm homicide decedents were examined, including 20.4% (n = 271) with no arrest records and 79.7% (n = 1,060) with an arrest record, as well as 55.6% (n = 740) with a prior conviction and 31.8% (n = 423) with a prior incarceration. A higher proportion of firearm homicide victims with an arrest record were male, another race than White, non-Latinx, and single or never married than those without an arrest record. This study further supports the existence of the victim-offender overlap and highlights demographic disparities in criminal justice involvement among victims of fatal firearm violence.

Chicago: Illinois Criminal Justice Information Authority, 2023. 16p.

By Vaughn Crandall, Reygan Cunningham, and Robin Campbell

Gun violence inflicts a grim toll on our nation. Every single day, 120 Americans are killed with guns and more than 200 are shot and wounded. Gun violence is the leading cause of death of children and teens in the U.S. Homicide is the leading cause of death for Black men under 44 and the second leading cause of death for Latino men. Both African American and Latinx communities are impacted by gun violence at rates that far exceed those of white communities. The economic consequences have been calculated to exceed $550 billion annually.

Oakland:  California Partnership for Safe Communities, 2024. 15p

By Brian A. Jackson, Melissa Kay Diliberti, Pauline Moore, Heather L. Schwartz

Shooting incidents at kindergarten through grade 12 (K–12) schools in the United States, including mass attacks like the one that killed 19 students and two teachers at Robb Elementary School in Uvalde, Texas, have sparked calls to increase security or adopt altogether new approaches to school safety. These approaches include allowing teachers or staff to carry firearms in some schools. To learn what teachers across the United States think about school safety generally and about specific proposals to enhance safety in schools, such as teacher-carry policies, RAND researchers administered a survey to a randomly sampled set of 973 K–12 teachers using the American Teacher Panel. The survey focused on teachers' views of safety in their schools, including their main safety concerns, perceptions of security measures in place, the effect of those measures on school climate, and whether they were concerned for their own safety and that of their students. On the specific issue of firearms in school, the survey asked whether allowing teachers to carry firearms would make schools more or less safe and whether teachers would personally carry a firearm if given the choice to do so. Findings note that teachers, like the U.S. population as a whole, are divided about armed teachers at school: Fifty-four percent of respondents reported believing that teachers carrying firearms will make schools less safe, 20 percent reported believing that it will make schools safer, and the final 26 percent reported feeling that it would make schools neither more nor less safe.

Key Findings

• Similar to older and state-specific surveys, this survey found that teachers are divided about arming teachers at school. Fifty-four percent of the nationally representative sample of teachers reported believing that teachers carrying firearms will make schools less safe, 20 percent reported believing that it will make schools safer, and the final 26 percent reported feeling that it would make schools neither more nor less safe.

• White teachers were more likely than Black teachers to feel that teachers carrying firearms would make schools safer, and male teachers in rural schools were most likely to say that they would personally carry a firearm at school if allowed.

• All told, about 550,000 of the country's 3 million K–12 teachers would choose to carry a firearm at school if allowed.

• Regardless of gender or race, roughly half of teachers felt that physical security measures at their school (which most commonly include locks, ID badges, cameras, and security staff) positively affected the school climate. Only 5 percent of teachers felt that their schools' physical security measures had a negative effect on school climate.

• Despite the growth in gun violence, bullying — rather than active shooters — was teachers' most common safety concern.

Recommendations

• Study early adopter schools or school districts that have more-expansive versions of teacher-carry programs to understand how they work in practice.

• Conduct a comprehensive cost-benefit analysis of programs allowing teacher-carry to rigorously assess their outcomes.

• Develop risk analysis approaches to inform school safety and security planning that balance frequent, lower-level forms of school violence, such as bullying, and lower-probability, extreme forms of school violence, such as shootings.

• Develop a deeper understanding of the sources of teachers' safety concerns.

• Identify how fears of victimization and of specific safety concerns contribute to teacher and principal turnover, and to student enrollment, attendance, and academic performance.

• Better characterize the combined effects of school security measures and strategies on safety, school climate, and student attendance and academic performance.

• Take the pulse of parents, teachers, administrators, and students about school safety measures to disaggregate by type of community and to triangulate their views on school safety.

Santa Monica, CA: RAND,  2023.

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By Michael Topper and Toshio Ferrazares

Latest Version Link ---Technology is integral to police departments, automating officer tasks, but inherently changing their time allocation. We investigate this by studying ShotSpotter, a technology that automates gunfire detection. Following a detection, officers are dispatched to the scene, thereby reallocating their time. We leverage this shock to officers’ time allocation using the rollout of ShotSpotter across Chicago police districts to study the effects on 911 call response. We find substantial consequences— officers are dispatched to calls slower (23%), arrive on-scene later (13%), and the probability of arrest is decreased 9%. Consequently, police departments must evaluate their resource capacities prior to implementing technologies. 

unpublished paper, 2024.

By Mitchell L. Doucette &Christa Green & Jennifer Necci Dineen & David Shapiro & Kerri M. Raissian

Over the past decade, large urban counties have implemented ShotSpotter, a gun fire detection technology, across the USA. It uses acoustic listening devices to identify discharged firearms’ locations. We examined the effect of ShotSpotter with a pooled, cross sectional time-series analysis within the 68 large metropolitan counties in the USA from 1999 to 2016. We identified ShotSpotter implementation years through publicly available media. We used a Poisson distribution to model the impact of ShotSpotter on firearm homicides, murder arrests, and weapons arrests. ShotSpotter did not display protective effects for all outcomes. Counties in states with permit-to-purchase firearm laws saw a 15% reduction in firearm homicide incidence rates; counties in states with right-to-carry laws saw a 21% increase in firearm homicide incidence rates. Results suggest that implementing ShotSpotter technology has no significant impact on firearm related homicides or arrest outcomes. Policy solutions may represent a more cost-effective measure to reduce urban firearm violence.

Journal of Urban Health, 2021.

By Veronica A. Pear, Mona A. Wright, Aaron B. Shev, Garen J. Wintemute & Rose M. C. Kagawa 

Background: The prevalence and characteristics of handgun purchasers’ criminal charge histories have never been described for a large population of firearm owners, but such information is critical to understanding risk factors for subsequent violence in this population. We sought to characterize legal handgun purchasers in California and compare this group to the state population, to quantify the proportion with a criminal charge history at purchase, and to identify modifiable factors associated with having such a history.

Methods: This cross-sectional study of all 79,927 legal handgun purchasers aged 21–49 years in California in 2001 used log-linear generalized additive models to identify factors associated with having a criminal charge history at purchase. Subjects are from a longitudinal study of incident criminal activity among handgun purchasers.

Results: The majority (91.03%) of purchasers were male; whites were overrepresented and Hispanics were underrepresented relative to their population size. At the time of purchase, 16.68%  had a criminal charge history and 10.71% had a criminal conviction. Among men with such a history, 31.28% had been charged with a violent crime and 16.54% had been charged with a firearm-related crime. The strongest factor associated with having a criminal charge history was redeeming a pawned handgun (prevalence ratio: 1.82; 95% confidence interval: 1.71, 1.93).

Conclusions: Despite California’s stringent firearm purchase laws, more than 1-in-6 handgun purchasers had a criminal charge history at purchase. This proportion may be higher in states with less restrictive firearm purchasing eligibility criteria.

Injury Epidemiology volume 8, Article number: 7 (2021) 

By Shelby L Bandel , Allison E Bond , Michael D Anestis 

Background: Firearms account for over 40,000 deaths in the USA each year in addition to thousands of nonfatal injuries. One notable prevention strategy for firearm-related fatalities and nonfatal injuries is safe storage. Safe storage of firearms emphasizes using storage mechanisms that limit the ready access of firearms to unauthorized users. Cable locks are one safe storage option that is easy to access and typically free, as they are included in many firearms sales. The present study examined the extent to which firearms retailers notifying purchasers at the point of sale about the included cable locks was associated with subsequent locking device use in two large samples and three subsamples. Exploratory analyses then examined demographic factors associated with the frequency of seller notification of locks.

Methods: Sample 1 included 1203 firearm owners and sample 2 included 1556 firearm owners. Subsamples were drawn from sample 2 to examine if there were differences by state. The three subsamples included firearm owners from Minnesota (n = 515), Mississippi (535), and New Jersey (506). Logistic regressions were used to examine the association between the frequency of sellers notifying buyers of locks and subsequent locking device use. Linear regressions were used to examine what demographic factors were associated with greater frequency of seller notification of locking devices.

Results: Results indicated a general trend such that more frequent notification of cable locks at the point of purchase was associated with a greater likelihood of using locking devices to secure firearms. At the subsample level, these findings were most consistent for Mississippi relative to Minnesota and New Jersey. Exploratory analyses generally indicated those who were younger and those living in more densely populated areas were more likely to be notified about cable locks at the point of purchase.

Conclusions: These findings suggest that interactions about cable locks at the point of firearm purchase has an impact on firearm storage behaviors. Such results indicate that encouraging firearm retailers to have these discussions with those purchasing firearms might be an important strategy for preventing firearm-related fatalities and nonfatal injuries.

Inj Epidemiol. 2023; 10: 11

By Alaina De Biasi, Anthony A. Braga, Brad Velasquez & Garen Wintemute 

Background: Privately made firearms (PMFs) or “ghost guns” are homemade, unserialized, untraceable firearms that have been increasingly used in violent crime in the United States. Very little is known about the types of PMFs recovered by law enforcement agencies and the crimes associated with these recoveries. This lack of information limits effective violence prevention policies and practices. Comparative analysis of PMF recoveries in specific cities helps clarify whether local PMF patterns and characteristics vary or reflect more general trends. This research advances epidemiological understanding of emergent violent gun injury prevention challenges by identifying variations in recovered PMF types and use in violent, drug, and weapon-related offenses in Los Angeles and San Diego, California.

Methods: Conjunctive analysis of case configurations (CACC) identifies patterns among observations (i.e., case configurations) and calculates their probability associated with a given outcome. CACC was used to identify the most common types of PMFs recovered by the Los Angeles (LAPD) and San Diego (SDPD) police departments. For each department and offense type, case configurations with above-average probabilities of offense involvement were determined. Comparisons across departments were made to identify similarities and differences in PMF characteristics and usage.

Results: PMFs were more likely to be involved in violent and weapon-related offenses in Los Angles but more likely to be involved in drug-related offenses in San Diego. In both cities, the 9 mm Polymer 80 handgun was the dominant PMF. However, 9 mm handguns were most likely to be involved in weapon-related offenses in Los Angeles compared to 0.40 handguns in San Diego. Furthermore, large-caliber handguns tended to display above-average probabilities of involvement in violent and drug offenses in Los Angeles. Long guns were represented in case configurations with above-average probabilities of involvement in substantive crimes, including violence.

Conclusions: Comparative analyses of PMF recovery patterns in Los Angeles and San Diego reveal meaningful contextual variations in PMF characteristics and suggest intentional firearm type selections by offenders. The results support increased regulation of PMFs and highlight the importance of efforts to identify and disrupt the illicit supply of large-caliber PMF handguns and PMF long guns.

Injury Epidemiology volume 11, Article number: 17 (2024)

By Michael Siegel, Devon Dunn , Faizah Shareef , Miriam Neufeld , Claire Boine 

Background: No previous study has identified the specific brands of guns owned by gun owners. This study aimed to (1) ascertain and describe patterns of brand- and model-specific gun ownership among US gun owners; and (2) investigate the relationship between gun owners’ brand and model preferences and their attitudes towards common firearm violence prevention policies.

Methods: Using a national, pre-recruited internet panel of US adults in 2019, we surveyed gun owners (N = 2086) to ascertain their opinions regarding firearm violence prevention policies and to assess the brands and models of guns that they owned.

Results: Brand-specific gun ownership was highly concentrated and was dominated by three pistol brands, two revolver brands, three rifle brands, and three shotgun brands. There was wide variation in policy attitudes among owners of different gun brands, but little variation among owners of different gun types (i.e., pistols, rifles, revolvers, shotguns). We were able to identify the specific gun models owned by 1218 (59.4%) of the gun owners. Based on the classification of these gun models into three types we categorized the gun ownership pattern of the sample as 33.4% recreational, 45.5% self-defense, and 21.1% tactical. There were marked differences in support for firearm-related policies among the three groups, with support generally highest among the Recreation group and lowest among the Tactical group.

Conclusion: We conclude that gun brands and models are strong predictors of a gun owner’s attitudes regarding firearm-related policies. This information could help public health practitioners develop segment-specific communications that will appeal to each group to more effectively engage gun owners in firearm violence prevention.

Inj Epidemiol 2021 Mar 22;8(1):12.

By André Duffles Teixeira Aranega, Ariel Faccioli Fernandes

Grounded on an extensive literature review derived from evidence-based studies (e.g., scientific articles, institutional and technical reports, journalistic evidence, academic books, and book chapters), our article develops a qualitative analysis to address the following question: to what extent do the strategic motivations of states and organized crime groups converge/diverge in the context of the current Russo-Ukrainian conflict? This article is divided into three parts. The initial section delves into the interconnections between illicit markets and armed conflicts. Secondly, after acknowledging the background of organized crime in both countries and the emergence of the current Russo-Ukrainian war, it highlights the implications of this conflict on the dynamics of illicit markets. Finally, it analyzes the strategic motivations of states and organized crime within this setting, as well as its points of convergence and divergence. This research potentially explores the frequently wicked ties of (inter)national politics and criminal adaptation during (post-)war times in Eastern Europe and within the international system.

  Journal of Illicit Economies and Development, 6(2): pp. 48–60. 2024.

By Guadalupe Correa-Cabrera, and Charles Lewis, and William Yaworsky

This article explains some of the mechanisms through which corruption by high-level Mexican politicians and other organized crime members is facilitated in the United States through money laundering operations. The analysis is based on information contained in court records related to key money laundering cases, as well as in news articles and reports from law enforcement agencies. These materials highlight the interrelationships among U.S. drug use, cartel activities in Mexico, human rights abuses, Mexican political corruption, and money laundering in the United States. This work demonstrates the pervasive use of legitimate businesses and fronts in the United States as a disguise for criminal activity. Finally, it provides recommendations for a reformation of policies and penalties directed toward U.S. institutions and persons that facilitate money laundering.

Journal of Illicit Economies and Development, 6(1): pp. 64–78. 2024

By Roberto Uchôa de Oliveira Santos

In recent decades, the global debate on gun control has been prominent, with many countries adopting more restrictive policies. Brazil followed this trend by implementing stringent measures in 2003; however, the presidency of Jair Bolsonaro in 2019 introduced normative changes aimed at facilitating public access to firearms and ammunition. Throughout his term, the legal firearms market doubled, allowing access to weaponry previously restricted to the general public. The analyzed hypothesis suggests that these normative changes, especially those related to the quantity and authorization of acquisition of previously restricted firearms, altered the types of firearms in circulation, strengthening the interaction between legal and illegal markets. Using data from the mandatory firearms re-registration, a total of 962,782 firearms were analyzed. The assessment of the increase in circulation of these firearms in the illegal market was conducted through the analysis of seizures in the states of Rio de Janeiro and São Paulo, revealing a significant growth in seizures of these types of firearms, possibly correlated with the increase in their circulation. Three police investigations were selected to exemplify how the connection between markets intensified, allowing criminals to obtain firearms in the legal market that were previously only accessible through international trafficking or diversion from state agencies.

Journal of Illicit Economies and Development, 6(1): pp. 16–29. 2024

By Nicole Kravitz-Wirtz , Rocco Pallin , Matthew Miller , Deborah Azrael , Garen J Wintemute

Objective: To describe the prevalence of and factors associated with firearm ownership; the types, subtypes, and quantity of firearms owned; and when, where and why firearms were acquired in California.

Methods: A cross-sectional analysis of a state-representative, probability-based, internet survey of California adults was conducted in September-October 2018 (n=2558; completion rate 49%). Household firearm ownership was ascertained for all respondents; personal firearm ownership was ascertained only among respondents who reported living in a home with firearms; and information on the types and quantity of firearms owned and details about recently acquired firearms came from firearm owners only.

Findings: Roughly one in four (25%, 95% CI 22% to 28%) California adults live in a home with a firearm, including 4.2 million adults-14% (95% CI 13% to 16%) of the adult population who personally own a firearm. These owners collectively own an estimated 19.9 million firearms (8.9 million handguns). Approximately half (48%, 95% CI 34% to 61%) of the firearm stock in California is owned by the 10% (95% CI 6% to 14%) of owners who own 10 or more firearms, though more than half (54%, 95% CI 47% to 62%) of owners in the state own only one or two firearms. Most (69%, 95% CI 63% to 75%) owners purchased their last firearm from a firearm retailer, usually a handgun purchased primarily for protection against people.

Conclusion: This study provides the most detailed and up-to-date information available on firearm ownership and acquisition in California. Results can inform firearm violence prevention efforts and public health, safety, and policy development in California and nationally.

Injury Prevention, Volume 26, Issue 6, 2020.

By Rose M. C. Kagawa and Elise D. Riley

Background: Unstably housed women experience high levels of violence. While previous studies have investigated psychological, physical, and sexual violence, weapon and gun violence are rarely delineated. We examined factors associated with experiencing violence as an adult among unhoused and unstably housed women, with a focus on gun violence. Methods: We recruited women with a history of housing instability from San Francisco homeless shelters, street encampments, free meal programs, low-income hotels, and health clinics. Participants completed interviews including questions regarding both childhood and adult violence. We used multivariable logistic regression to examine associations of specific types of childhood violence (i.e., physical, sexual, gun, and other weapon-involved violence), age, race, ethnicity, educational attainment, and sexual orientation, with risk of experiencing specific types of violence as an adult (i.e., gun, other weapon-involved, physical violence). Because the violence outcomes were not rare, odds ratios were transformed to approximate risk ratios. Results: Nearly half of women (n = 110, 45%) had been attacked with a gun as an adult. Violent victimization in adulthood was common, with 33% having experienced all three forms of violence. The probability of being attacked with a gun as an adult was almost 70% higher among women who had been hit or kicked hard enough to cause injury as a child (RR = 1.68; 95% CI = 1.24, 2.11), and this association was present for all three violence outcomes. No other risk factors explored, including other types of violence experienced as a child, met the statistical threshold to be considered significant. Conclusions: The high prevalence of gun violence reported here is consistent with prior studies of violence conducted in similar populations. Considered in combination with prior research, findings suggest that multi-generational violence prevention interventions for low-income women and girls are needed. They also emphasize the need to more actively include people who experience unstable housing in statewide and national violence surveys to better understand the extent of the problem and address on a broader scale the high rates of violence experienced by unstably housed populations, which have been consistently documented in local research

Inj. Epidemiol. 8:52, 2021

By Garen J. Wintemute 

Inter-related sustained upward trends in firearm purchasing, violence, and political extremism are converging to put the USA at risk for disaster and threaten our future as a democracy. This narrative review provides a critical assessment and call to action. It explores each trend separately, considers the effects of their likely and imminent convergence, and suggests possibilities for collective and individual action to prevent or at least reduce those effects.

Injury Epidemiology volume 8, Article number: 64 (2021)

By Julia P. Schleimer , Rose M. C. Kagawa and Hannah S. Laqueur

Background: Firearms are the most lethal method of suicide and account for approximately half of all suicide deaths nationwide. We describe associations between firearm purchasing characteristics and firearm suicide. Methods: Data on all legal handgun transactions in California from 1996 to 2015 were obtained from the California Department of Justice Dealer’s Record of Sale database. Handgun purchasers were linked to mortality data to identify those who died between 1996 and 2015. To account for variation in timing and duration of observation time, analyses were stratified by birth cohort. The primary analysis focused on those aged 21–25 in 1996. A secondary analysis tested associations among those aged 50–54 in 1996. Using incidence density sampling, purchasers who died by firearm suicide (cases) were each gender-matched to 5 purchasers (controls) who remained at risk at the case’s time of death. We examined the characteristics of purchasers and transactions, focusing on the transaction closest in time to the case’s death. Data were analyzed with conditional logistic regression. Results: There were 390 firearm suicides among the younger cohort and 512 firearm suicides among the older cohort. Across both cohorts, older age at first purchase and the purchase of a revolver were associated with a greater risk of firearm suicide. For example, among the younger cohort, those who purchased a revolver versus a semiautomatic pistol had 1.78 times the risk of firearm suicide (95% CI 1.32, 2.40) in multivariable models. Other associations varied across cohorts, suggesting cohort or age effects in purchasing patterns. Conclusions: Findings add to the evidence on firearm suicide risk and may help inform prevention strategies and future research.

Injury Epidemiology  2021. 8(68)

By Sonja A. Swanson,  Matthew Miller, Yifan Zhang, Lea Prince, Erin E. Holsinger, Zachary Templeton and David M. Studdert

Background: Little is known about the voluntary divestment of firearms among US firearm owners. Here, we aim to estimate the proportion of handgun owners who divest their handguns in the years following their initial acquisition; examine the timing, duration, and dynamics of those divestments; and describe the characteristics of those who divest. Methods: We use data from the Longitudinal Study of Handgun Ownership and Transfer, a cohort of registered voters in California with detailed information on 626,756 adults who became handgun owners during the 12-year study period, 2004–2016. For the current study, persons were followed from the time of their initial handgun acquisition until divestment, loss to follow-up, death, or the end of the study period. We describe the cumulative proportion who divest overall and by personal and area-level characteristics. We also estimate the proportion who reacquired handguns among persons who divested. Results: Overall, 4.5% (95% CI 4.5–4.6) of handgun owners divested within 5 years of their first acquisition, with divestment relatively more common among women and among younger adults. Among those who divested, 36.6% (95% CI 35.8–37.5) reacquired a handgun within 5 years. 

Injury Epidemiology 9(2)   2022.