Brooke and Gau used data from the U.S. Bureau of Justice Statistics’ 2004 Survey of Inmates in State and Federal Correctional Facilities, one of the most comprehensive datasets available for studying the characteristics of the incarcerated population in the United States. Working from this large national sample, they examined the relationship between military service experience and lifetime arrests, using multivariate regression analysis to isolate the contribution of military service variables while controlling for other factors that might drive arrest rates. What distinguishes this research from prior work in the same area is the specificity of what they measured on the military service side of the equation.

Most research on military service and criminal justice outcomes treats military service as a binary: someone either served or they did not. Brooke and Gau’s study tested six distinct dimensions of the military experience: whether someone served at all, age of entry into service, length of service, combat exposure, discharge type (honorable, general, other-than-honorable, dishonorable), and branch affiliation. This multi-dimensional approach matters because it allows the research to identify which specific elements of the military experience are doing the work in producing the arrest differential, rather than leaving “military service” as an unexplained aggregate effect that tells practitioners and policymakers nothing useful about which aspects of service are protective, which are risk-amplifying, and which are simply neutral with respect to criminal justice outcomes.

The sample composition itself is informative. Approximately 10 percent of the state prison inmates in the study sample reported military service. Given that about 13 percent of all Americans have served in the military at some point in their lives, the incarcerated population in this sample had a slightly lower rate of veteran representation than the general population, which itself complicates simple narratives about the relationship between military service and criminal justice involvement. Veterans are not overrepresented in state prisons relative to their share of the general population, and within the incarcerated population, those who served accumulated fewer lifetime arrests than those who did not. The research is contributing nuance to a conversation that tends to default to broad strokes in both the “military service is uniformly protective” and “military service causes trauma that produces crime” directions.

The primary finding of Brooke and Gau’s analysis is that among incarcerated state prison inmates, military experience as a whole was associated with fewer lifetime arrests compared to inmates without military service. Among the six dimensions of military experience the study examined, however, only one showed a statistically significant relationship with the number of lifetime arrests: length of service. Inmates who had served longer accumulated fewer arrests than those who served shorter periods, with the relationship running in the expected protective direction. The other dimensions, including age of entry, combat exposure, discharge type, and branch affiliation, did not emerge as significant predictors of lifetime arrests in the multivariate analysis.

The length-of-service finding is the most policy-relevant result in the study because it moves the conversation from “did this person serve” to “how much did service actually function as an organizing structure in this person’s life.” Criminological theory offers several explanations for why longer service might be associated with lower arrest rates. Longer service means more time embedded in an institutional structure with clear behavioral expectations, formal accountability, peer community, and the daily discipline that the military imposes on its members. It means more time during which the counterfactual life course, the one that might have included earlier or more frequent encounters with the criminal justice system, was not being lived. It means, in the language of life course criminology, a longer “turning point” period in which the military functioned as a social bond that redirected trajectories that might otherwise have led to higher arrest accumulation.

The non-significant findings are equally informative, even if they generate less straightforward narrative. Combat exposure not emerging as a significant predictor of lifetime arrests is a finding that cuts against the more alarmist accounts of veterans and crime, which have sometimes conflated combat exposure with PTSD with violence risk in ways that the empirical record does not consistently support. The relationship between combat exposure and specific types of post-service criminal behavior is genuinely complex, but Brooke and Gau’s analysis found that combat exposure, examined across their full sample of incarcerated veterans, was not a significant driver of overall lifetime arrest accumulation. This doesn’t mean combat exposure has no relationship with specific criminal justice outcomes for specific veterans, it means the relationship is not straightforwardly linear in the way that simplified accounts suggest.

The Prison Policy Initiative’s Research Library is one of the most referenced compilations of criminal justice scholarship in the policy advocacy space. It is used by defense attorneys, public defenders, sentencing advocates, legislative staffers, nonprofit researchers, and journalists who need to locate peer-reviewed evidence on specific questions about incarceration, criminal justice outcomes, and the populations affected by both. When PPI adds a study to its library, the audience is not primarily academic: it is the practitioner community that translates research findings into courtroom arguments, legislative testimony, grant proposals, and program design. Brooke and Gau’s study on military service and lifetime arrests landing in that library means it will now reach the people who are deciding, right now, whether to expand veteran court programs, how to design intake screenings that account for military service history, and how to make sentencing arguments on behalf of incarcerated veterans who have received inadequate credit for their service in the criminal justice process.

Veteran treatment courts, also called veteran courts, are a specialized diversionary court model that has expanded significantly over the past fifteen years. As of the most recent national data, there are more than 500 veteran treatment court programs operating across the United States, designed to route veterans with substance use disorders, mental health conditions, and PTSD-related criminal behavior into treatment and support services rather than standard incarceration. The rationale for these courts rests on a combination of research evidence and moral argument: veterans who encounter the criminal justice system often do so through pathways directly connected to their service experience, and a system that is designed for general-population offenders is poorly equipped to address the specific constellation of service-connected conditions that drive a veteran’s behavior in those cases.

Brooke and Gau’s finding that longer service is associated with fewer lifetime arrests is relevant to the veteran court argument in a specific way: it suggests that the protective effects of military service are real and measurable even within an incarcerated population, which is already a highly selected group with elevated baseline risk factors. If military service retains a protective association with arrest outcomes even among people who ended up in prison, the argument for diverting veterans from the prison pipeline gains empirical support. The research is saying, in effect, that something about longer military service reduces arrest accumulation even in a population that has experienced enough adversity to end up incarcerated, and that the criminal justice system’s treatment of veterans should account for that protective factor rather than ignoring it.

The research finding that longer military service is associated with fewer lifetime arrests sits in sharp tension with what we know about how veterans are treated once they are in the criminal justice system. The same week that Brooke and Gau’s paper was added to the Prison Policy Initiative Research Library, the Florida death penalty coverage at Sustainable Action Now was documenting execution after execution of military veterans: Curtis Beasley, the 13th veteran executed under DeSantis, died on September 29. William Reaves, a Vietnam veteran whose jury never heard how his combat-related PTSD affected his mental state on the night of the crime, faced execution on October 20. Jim Pavatt, who served nearly 22 years in the Air Force, was scheduled for execution in Oklahoma on November 12, the day after Veterans Day. The jury that sentenced Pavatt to death never heard his final rank.

The gap between what the research says about veterans and what the system does with veterans is the gap that the Prison Policy Initiative’s Research Library, the work of Brooke and Gau, and the advocacy of organizations working on veteran criminal justice issues are all trying to close. Research like this study becomes evidence in clemency petitions, sentencing hearings, parole board presentations, and legislative testimony about veteran court funding. The private prison system, in particular, has every financial incentive to process incarcerated veterans the same way it processes every other person in its custody: as a per-diem revenue source. It has no institutional incentive to distinguish between an inmate who served 15 years and an inmate who served 15 months, even if the research says those two people have systematically different arrest histories and potentially different treatment needs. Making that distinction requires the kind of policy and advocacy work that research like Brooke and Gau’s enables.

About 13 percent of Americans have served in the military at some point in their lives. Approximately 10 percent of the state prison inmates in Brooke and Gau’s study sample reported military service, which means veterans are not dramatically overrepresented in state prisons relative to their share of the general population. What they are is inadequately distinguished. The criminal justice system, and particularly the private prison system that now holds a growing share of the federal and state incarcerated population, does not routinely screen for military service history, does not systematically connect incarcerated veterans to VA services, and does not apply the service-length data that Brooke and Gau found significant in assessing either risk levels or treatment needs. That’s the gap. The research fills in one part of the evidence base for closing it.

Sustainable Action Now: Private Prisons and Criminal Justice Coverage

The Brooke and Gau research on military service and lifetime arrests, the Watanabe Supreme Court case on prison medical rights, the death penalty executions of veterans whose juries never heard their service histories: these are all parts of the same story about what the American carceral system does with the people it holds and what it refuses to account for. We cover it all.