Research & Data
Missing Persons draws on peer-reviewed research, government data, expert analysis, and investigative reporting. The sources below inform selected claims explored by the project.
The Brain Under Confinement
Cognitive Decline as a Result of Incarceration and the Effects of a CBT/MT Intervention
Rebecca Umbach, Adrian Raine & Noelle R. LeonardA cluster-randomized controlled trial with 197 incarcerated males aged 16 to 18 measured changes in cognitive control, emotion regulation, and emotion recognition over approximately four months. Performance on all three measures declined for the control group. A cognitive behavioral therapy and mindfulness training intervention limited decline in cognitive control and emotion regulation, but not emotion recognition.
Psychosis in Prison
Richard J. Thurrell, Seymour L. Halleck & Arvid F. JohnsenAn early clinical analysis, now more than sixty years old, arguing that the prison environment itself, through restriction of meaningful relationships and productive activity, functions as a precipitating factor in psychotic episodes among incarcerated people. The authors contend that idleness and severed social bonds produce atrophy that manifests as psychiatric breakdown.
The Psychological Impact of Incarceration: Implications for Post-Prison Adjustment
Craig Haney, University of California Santa CruzAn expert paper prepared for HHS analyzing institutionalization as a psychological process: incarcerated people develop dependence on institutional structure, hypervigilance, emotional over-control, and diminished self-worth. These are adaptations that make prison survivable but become serious barriers to reintegration after release.
Prison and the Brain: Neuropsychological Research in the Light of the European Convention on Human Rights
Sjors Ligthart, Laura van Oploo, Jesse Meijers, Gerben Meynen & Tijs KooijmansThis study synthesizes neuropsychological research on the effects of imprisonment and applies it to the legal framework of the European Convention on Human Rights. A study in a Dutch remand prison found that brain functions connected to self-regulation declined measurably after three months of imprisonment. The authors examine these findings under Article 3's prohibition of torture and inhuman treatment and under the ECHR's broader principle of rehabilitation.
Personal Control and Inmate Adjustment to Prison
Lynne Goodstein, Doris Layton MacKenzie & R. Lance ShotlandOne of the earliest systematic analyses of how prison strips people of personal control across three dimensions: the ability to influence outcomes, meaningful choices, and the ability to predict future events. The authors apply learned helplessness, self-efficacy, and reactance models to the adjustment process, arguing that the removal of control produces psychological adaptations that become dysfunctional after release.
The Role of the Hippocampus in Flexible Cognition and Social Behavior
Ryan D. Rubin, Phillip D. Watson, Melissa C. Duff & Neal J. CohenA foundational review of how the hippocampus enables flexible cognition, including memory, language, and social interaction, by creating relational representations of environments and linking them to prior experience. The paper establishes that hippocampal damage disrupts not only memory but a broad range of capacities that depend on flexible, relational thinking. This foundational work is directly relevant to research showing that chronic stress and institutional confinement produce measurable hippocampal atrophy.
How Prison Quietly Reshapes Human Identity
Sigifredo Castell Britton, Ph.D.Commentary drawing on psychological research and clinical observation: prolonged incarceration gradually replaces a person's pre-existing identity with an institutional self, a survival-adapted persona that persists after release and shapes behavior in ways the legal sentence never intended. The underlying scholarly literature is cited in the article.
Isolation Across Environments
What happens to people in Antarctica, space, prison, and military confinement, and what the parallels reveal.
| Environment | Duration | Primary Stressors | Observed Brain Changes | Key Researcher |
|---|---|---|---|---|
| Antarctica (Winter-Over) | 8 to 14 months | Sensory monotony, social constriction, darkness, confinement | Reduced dentate-gyrus volume, lower BDNF (n=8 to 12; preliminary finding requiring replication) | Stahn et al., Charité / U Penn (NEJM 2019) |
| Space (ISS / Long Duration) | 6 to 12+ months | Microgravity, isolation, loss of autonomy, distance from family | Cognitive and emotional changes documented; specific brain-structure effects vary by study | Dr. Phyllis Johnson, UBC; NASA Human Research Program |
| Prison (General Population) | Months to decades | Chronic threat, loss of agency, social deprivation, sensory stress | PTSD, executive function impairment, hypervigilance; BDNF suppression observed in animal isolation models | Sapolsky (Stanford); Smeyne (Jefferson), animal models; Haney (UCSC), psychological |
| Solitary Confinement | Days to years | Extreme sensory deprivation, total social isolation, loss of identity | Hallucinations, dissociation, self-harm, permanent psychological damage | Multiple (Haney; Smith) |
| Military Confinement (POW) | Weeks to years | Fear, physical stress, unpredictability, loss of identity | Complex PTSD, amygdala hyperreactivity, memory fragmentation | VA / DoD Research |
It seems like we have been sentenced to trauma
— Eric VanZant, Advocate & AuthorThe Crisis After Release
Release from Prison, A High Risk of Death for Former Inmates
Ingrid A. Binswanger et al., Washington State cohort, 1999 to 2003Tracking mortality among 30,237 people released from Washington State prisons between 1999 and 2003, this study established that the post-release period is among the most medically dangerous transitions a person can face, with sharply elevated risk of death from overdose, cardiovascular disease, homicide, and suicide compared to the general population.
Our Epidemic of Loneliness and Isolation
Dr. Vivek Murthy, U.S. Surgeon GeneralThe 2023 Surgeon General's advisory documents the broad health consequences of social disconnection, finding that lacking adequate social connection can be as dangerous as smoking up to 15 cigarettes a day. The advisory does not address incarceration directly; the connection to people who are incarcerated or recently released is an editorial inference drawn by this project.
Effect of Early and Later Colony Housing on Oral Ingestion of Morphine in Rats
Bruce K. Alexander, Barry L. Beyerstein, Patricia F. Hadaway & Robert B. CoambsThe original Rat Park study found that rats housed in an enriched, social colony environment consumed dramatically less morphine solution than rats housed in isolated cages, even after forced physical dependence. This is an animal study with acknowledged limits on human generalization. The authors proposed that addiction is shaped substantially by environmental conditions, not only by pharmacology.
Mental Health in U.S. Prisons: Prevalence and Treatment
Bureau of Justice StatisticsFederal data on mental health conditions among incarcerated people documents staggering rates of untreated mental illness, and near-total absence of therapeutic intervention. The majority of people leaving prison have unaddressed trauma, depression, or anxiety disorders.
Psychological Stressors of Imprisonment and Coping Among Older Incarcerated Persons
Stuart McLennan, Leila Meyer, Tenzin Wangmo et al.Qualitative interviews with older incarcerated people and mental-health professionals in Switzerland identified two dominant stressors: loss of physical and emotional closeness in relationships, and loss of personal autonomy. Participants described five coping strategies, including withdrawal, self-improvement, and maintaining outside connections, to manage conditions that the environment itself does not resolve.
Health Condition Prevalence Among People with Recent Homelessness or Incarceration
Lucas Zellmer, Renee Van Siclen, Peter Bodurtha et al.An observational analysis of 4.3 million individuals in a Minnesota statewide health system found that people with recent incarceration or homelessness had substantially elevated rates of mental health conditions, substance use disorders, and respiratory illness compared to the general population. The study estimates prevalence, it does not establish that incarceration caused every observed condition. The authors call for payment and care-delivery models that account for this complexity.
Study on the Mental and Emotional Cost of Incarceration
Cornelius D. Jones, Jones Counseling ServicesThis paper documents that the prison environment directly exposes people to every major PTSD-inducing category, including combat-like violence, coercion, sexual assault, bullying, and sustained toxic environments. The author reviews a sharp rise in ex-offenders meeting three or more DSM-5 criteria for PTSD and argues that prison-related PTSD is a distinct, underserved public health problem, proposing that the Department of Corrections and the Department of Justice have a structural obligation to provide long-term clinical resources for people leaving custody.
The Impact of Imprisonment on Individuals' Mental Health and Society Reintegration
Olga Cunha, Andreia de Castro Rodrigues, Maria Manuela Peixoto et al.A rigorous study protocol examining how prison sentences affect mental health during incarceration and after release. The authors review evidence that prison sentences have a null or criminogenic effect on recidivism while dramatically worsening mental health outcomes. The study uses a cross-sectional and longitudinal design in the Portuguese prison system, following male and female participants through incarceration and for one year after release.
ICE Detainees Dying by Suicide at an "Alarming" Rate
Ryan J. Foley, Michael Biesecker & Morgan Lee (Associated Press)An AP investigation documented at least 10 deaths by suicide inside ICE detention between January 2025 and mid-2026, a rate public health experts described as unprecedented and alarming. The investigation focuses specifically on civil immigration detention during this period, not the broader U.S. carceral system. Experts attributed the spike to failures in mental health screening and inadequate oversight of detention conditions.
The data is not abstract.
Share of Adult Suicides After Recent Jail Release
Miller et al.Cohort modeling study involving nearly 7.1 million U.S. adults released from incarceration in 2019. The study found that approximately 20% of all suicides that year occurred among people released from jail within the prior twelve months, and 7% among those in their second year post-release. The post-release window is among the highest-risk periods in public health.
Suicide After Release from Prison: A Population-Based Cohort Study
Haglund, Tidemalm, Jokinen, Långström, Lichtenstein, Fazel & RunesonPopulation-based Swedish cohort study tracking 26,953 individuals released from prison between 2005 and 2009. Of all deaths following release, 14% were by suicide. The suicide rate was 204 per 100,000 person-years, yielding an incidence rate ratio of 18.2 compared with matched general population controls, with the highest risk in the weeks immediately following release.
Incarceration and Subsequent Risk of Suicide: A Statewide Cohort Study
Morgan, Rivara, Ta, Grossman, Jones & Rowhani-RahbarStatewide cohort study quantifying the relationship between incarceration and suicide risk both during confinement and in the years following release. The study identifies incarceration as a persistent, independent risk factor for suicide, separate from and compounding any pre-existing mental health conditions at the time of entry.
Deaths in Jail: A Retrospective Analysis of Autopsies (1999–2022)
Belli, Romão, Lacquagni, Bertoglio, Bertolotti, Tamellini, Morini, Javan, Setti & VisonàRetrospective forensic analysis of 86 custodial deaths at the Legal Medicine Unit of Pavia, Italy between 1999 and 2022. Suicide, primarily by hanging, was the leading cause of death in detention. Psychiatric vulnerability and conditions of isolation were consistent precipitating factors across cases, with few deaths unconnected to institutional conditions.
French Prisons Strengthen Prevention as Inmate Suicides Rise
Medscape Medical News157 incarcerated people died by suicide in French prisons in 2023, a 13% increase over the prior year. The suicide rate inside French prisons is 10 times that of the general population, and that rate doubles again for people held in solitary confinement. The reporting covers France's national response and the evidence base driving new prevention protocols.
DOJ Watchdog: Federal Prison Not Doing Enough to Prevent Inmate Suicides
NPR National DeskA DOJ Inspector General review of Lewisburg Federal Prison found that guards were not equipped with ligature-cutting tools, in direct violation of Bureau of Prisons policy, contributing to preventable deaths. From January 2022 through March 2024, the facility recorded 16 suicide attempts, five in restrictive housing. Over an eight-year period, 344 federal inmates died by suicide across the BOP system.
Coroner Warns of More Suicides at Overcrowded Hakea Prison
The West Editorial StaffWestern Australia's coroner warned that additional deaths by suicide were likely at Hakea Prison following an extended period of extreme overcrowding, including 45 consecutive days above 100% capacity, with men sleeping on mattresses on cell floors. The facility's own deputy superintendent stated it was no longer fit for purpose. The prison inspector issued a rare ministerial show-cause notice in May 2024.
Who Returns, and Why
Custodial Sanctions and Reoffending: A Meta-Analytic Review
Deanna M. Petrich, Travis C. Pratt, Chelsey S. Gau & Jillian J. TuranovicA meta-analysis of 116 studies examining whether custodial sentences reduce reoffending compared to non-custodial alternatives. The review found that incarceration had a null or slightly criminogenic average effect on recidivism, meaning it neither reliably reduced reoffending nor dramatically worsened it, but that more punitive conditions tended toward worse outcomes.
The Public Is Best Served by a Prison System That Rehabilitates
Prison Reform TrustA letter responding to reporting on Scandinavian-model prison wings at HMP Wandsworth and HMP Pentonville in England, where documented reductions in assaults, self-harm, and staff absence followed greater staff-prisoner interaction, respect, and opportunities for skill development. The Prison Reform Trust argues that dignity, purpose, and positive relationships are not luxuries but foundations for safety and change, and that the framing of rehabilitation as "soft" sets up a false binary with punishment.
Why Prison Often Fails to Change Behavior
Sigifredo Castell Britton, Ph.D.Commentary drawing on clinical observation and cited psychological research: punishment-focused incarceration manages behavior through containment but does not address the emotional and psychological conditions that produced that behavior. The article argues this is why recidivism rates have remained persistently high across decades of sentencing policy reform.
Bureau of Justice Statistics rearrest data for the 2005 state-prisoner release cohort, tracked over nine years.
| Cohort | Rearrested Within 1 Year | Rearrested Within 3 Years | Rearrested Within 5 Years | Rearrested Within 9 Years |
|---|---|---|---|---|
| 2005 State-Prison Release Cohort (BJS) | 44% | 68% | 77% | 83% |
Source: Bureau of Justice Statistics, 2018 Update on Prisoner Recidivism: A 9-Year Follow-Up Period (2005 to 2014). Rearrest measures an arrest, not a conviction or return to prison. These figures are for the specific 2005 release cohort and may not represent current populations.
How We Got Here
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Neuroscience of Incarceration: A Summary
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Complete annotated bibliography of all studies, reports, and primary sources referenced in the film and companion materials.
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