Conditions & Operations
Solitary Confinement & Restrictive Housing
Georgia's Special Management Unit represents one of the most extreme examples of prolonged solitary confinement in the United States, with 78 percent of its 182 prisoners held in isolation for more than two years as of July 2017, despite overwhelming scientific evidence that solitary confinement causes severe psychological harm. The Georgia Department of Corrections has systematically violated a 2019 settlement agreement designed to improve conditions, prompting a federal court to impose $2,500 daily fines beginning May 2024 after finding "flagrant" violations and discovering that compliance documents had been falsified. This pattern of non-compliance occurs against a backdrop of catastrophic understaffing—approximately 50 percent vacancy rates agency-wide and exceeding 70 percent at Georgia's ten largest facilities—creating conditions where vulnerable prisoners are housed in shower stalls, denied basic hygiene, and left without adequate medical response to treatable injuries.The concentration of harm in Georgia's system mirrors national trends documented across the prison population. Fifty percent of all prison suicides occur among the approximately 6 to 8 percent of prisoners held in solitary confinement, yet 39 percent of Georgia's SMU population had diagnosed mental illness. Researchers have documented that 91 percent of solitary confinement prisoners report anxiety, 77 percent report chronic depression, and 70 percent report an impending nervous breakdown. Individuals with mental illness in solitary are approximately seven times more likely to self-harm than those in the general population. A June 2025 meta-analysis synthesizing data from 171,300 inmates found significantly greater psychological distress and psychiatric symptoms, including self-harm and thought disorders, among those in solitary confinement. The practice also perpetuates racial disparities: Black individuals comprise 38 percent of the Federal Bureau of Prisons population but 59 percent of Special Management Unit placements, while Black women comprise only 22 percent of the female prison population but 42 percent of women in solitary.Georgia's resistance to reform, despite court orders and DOJ findings, reflects a broader national struggle over solitary confinement policy. While approximately 25 states introduced restrictive housing legislation between 2018 and 2020, and seven states enacted reforms in 2021 alone—with Connecticut, Nevada, New York, and New Jersey establishing 15 to 20-day maximum limits aligned with United Nations Mandela Rules—Georgia remains among the most punitive jurisdictions. The Eleventh Circuit, which governs Georgia, has issued no definitive ruling on solitary confinement's constitutional limits, creating legal uncertainty. Named individuals like Timothy Gumm, held 7.5 years in the SMU despite 14 transfer recommendations, and Johnny Mack Brown, confined for 9 years, exemplify the indefinite isolation that violates international standards establishing 15 days as the maximum threshold before solitary constitutes torture.The gap between court orders and on-the-ground compliance demands urgent investigation. GPS should obtain current SMU population data, independent monitor reports filed since April 2024, and staffing figures at Georgia Diagnostic and Classification Prison to assess whether conditions have actually improved. Cross-referencing mortality databases with housing assignments could establish Georgia-specific correlations between solitary placement and suicide risk. The DOJ's October 2024 findings report containing 82 recommendations and the subsequent contempt order suggest potential litigation or consent decree—tracking the trajectory of federal enforcement action is critical to understanding whether meaningful systemic change will follow.
Pre-written explainers based on this research
Key Findings
The most impactful data from this research collection.
78%
78% of Georgia solitary inmates held over 2 years
Statistic22
Solitary inmates confined 22-24 hours per day in Georgia
Case detailAll Data Points
114 verified data points extracted from primary sources.
Prison suicides concentrated in solitary confinement population Statistic
50% of prison suicides occur among people in solitary confinement, who comprise only 6–8% of the total prison population.
50% vs. percent of total prison population in solitary
Percentage of Georgia SMU prisoners held more than 2 years Statistic
78% of prisoners (141 of 182) in Georgia's Special Management Unit had been held in isolation for more than 2 years as of July 2017.
78%
Percentage of Georgia SMU prisoners with diagnosed mental illness Statistic
39% of prisoners in Georgia's Special Management Unit had a diagnosed mental illness, despite the well-documented harm isolation inflicts on mental health.
39%
UN Mandela Rules 15-day maximum for solitary confinement Legal fact
The UN Mandela Rules define prolonged solitary confinement as exceeding 15 consecutive days and classify it as a form of torture.
Daily fines imposed on GDC for contempt Statistic
A federal court imposed daily fines of $2,500 ($75,000 per month) on the Georgia Department of Corrections starting May 20, 2024, for a period of 6 months, after finding 'flagrant' violations of the settlement agreement governing SMU conditions.
$2,500 vs. dollars per month
GDC staffing vacancy rate approximately 50% Statistic
The DOJ found an approximately 50% staffing vacancy rate across the Georgia Department of Corrections, with critical understaffing making even basic prisoner escorts impossible, contributing to deaths from treatable injuries.
50%
GDC staffing vacancy rate greater than 70% at 10 largest facilities Statistic
The DOJ found staffing vacancy rates greater than 70% at the 10 largest GDC facilities.
70%
Academic research consistency on solitary confinement harm spans 150+ years Finding
A comprehensive review published in Crime and Justice in 2018 found that research on psychological harm from solitary confinement has been 'strikingly consistent since the early nineteenth century,' spanning different methodologies, populations, and…
Grassian's identification of solitary confinement psychiatric syndrome Finding
Dr. Stuart Grassian of Harvard Medical School described solitary confinement conditions as 'strikingly toxic to mental functioning, producing a stuporous condition associated with perceptual and cognitive impairment and affective disturbances.' He i…
Grassian finding on florid delirium in severe cases Finding
In severe cases of solitary confinement, prisoners develop what Grassian termed 'florid delirium—a confusional psychosis with intense agitation, fearfulness, and disorganization.'
Grassian finding on harm to psychologically resilient inmates Finding
Dr. Stuart Grassian found that even psychologically resilient inmates suffer 'severe psychological pain' from prolonged isolation, and that the harm may result in 'prolonged or permanent psychiatric disability.'
2025 PLOS One meta-analysis sample size of 171,300 inmates Finding
A landmark meta-analysis published in PLOS One in June 2025 synthesized data from 171,300 inmates across multiple studies and found significantly greater psychological distress, more psychiatric symptoms (including self-harm, thought disorders, and …
Washington State 2024 study: 50% clinically significant depression/anxiety/guilt Statistic
A 2024 Washington State study randomly sampled 106 prisoners in long-term solitary and administered the Brief Psychiatric Rating Scale (BPRS), finding clinically significant depression, anxiety, and guilt in 50% of participants.
50%
Haney symptom prevalence: 91% anxiety in solitary Statistic
Dr. Craig Haney documented that 91% of prisoners held in solitary confinement reported anxiety in his study sample.
91%
Haney symptom prevalence: 86% oversensitivity to stimuli in solitary Statistic
Dr. Craig Haney documented that 86% of prisoners held in solitary confinement reported oversensitivity to stimuli.
86%
Haney symptom prevalence: 83% social withdrawal in solitary Statistic
Dr. Craig Haney documented that 83% of prisoners held in solitary confinement reported social withdrawal.
83%
Haney symptom prevalence: 77% chronic depression in solitary Statistic
Dr. Craig Haney documented that 77% of prisoners held in solitary confinement reported chronic depression.
77%
Haney symptom prevalence: 70% impending nervous breakdown in solitary Statistic
Dr. Craig Haney documented that 70% of prisoners held in solitary confinement reported an impending nervous breakdown.
70%
Haney symptom prevalence: 68% heart palpitations in solitary Statistic
Dr. Craig Haney documented that 68% of prisoners held in solitary confinement reported heart palpitations.
68%
Premature deaths more likely for those with solitary history after release Finding
Research has demonstrated that premature deaths—including suicide, homicide, and opioid overdose—after release from prison are significantly more likely for individuals who spent any time in solitary confinement during their incarceration, compared …
Self-harm rate 7x higher for mentally ill in solitary vs. general population Statistic
Individuals with mental illness in solitary confinement are approximately 7 times more likely to self-harm than those in general population.
7.0x times more likely to self-harm vs. general population prisoners with mental illness
Observation cell paradox: suicide watch cells filled from segregation Finding
Suicide watch cells are disproportionately filled with prisoners transferred from segregation units, indicating a pattern of cycling between isolation and crisis intervention rather than adequate mental health care.
Augustine and Pifer cycling study: three reentry shocks identified Finding
A 2025 study by Dr. Dallas Augustine and Dr. Natalie Pifer found that prisoners transitioning from long-term solitary to general population experience three core 'reentry shocks': (1) sensory overload, (2) social disorientation, and (3) institutiona…
Some prisoners deliberately return to solitary due to familiarity Finding
The 2025 Augustine and Pifer study found that some individuals deliberately commit infractions to return to solitary where conditions, while harmful, are at least familiar and predictable.
Racial disparity: Black individuals 38% of BOP but 59% of SMU placements Statistic
Federal Bureau of Prisons data from 2022 shows Black individuals constituted 38% of the total BOP population but 59% of Special Management Unit placements.
59% vs. percent of total BOP population (Black individuals)
Racial disparity: White individuals 58% of BOP but 35% of SMU placements Statistic
Federal Bureau of Prisons data from 2022 shows White individuals made up 58% of the total BOP population but only 35% of Special Management Unit placements.
35% vs. percent of total BOP population (White individuals)
Gang labeling amplifies solitary placement risk and duration Finding
A 2025 study by Tublitz and colleagues found that gang labeling 'sticks' even after formal debriefing, amplifying risks for solitary placement and extending the duration of isolation for affected individuals.
Racial disparity among women: Black women 42% of solitary but 22% of female population Statistic
According to Liman Center data, Black women comprised 42% of women in solitary confinement but only 22% of the total female prison population.
42% vs. percent of total female prison population (Black women)
Mandela Rules adopted December 17, 2015 Legal fact
The United Nations Standard Minimum Rules for the Treatment of Prisoners (Nelson Mandela Rules) were adopted by the UN General Assembly on December 17, 2015, through Resolution 70/175.
Mandela Rules definition of solitary confinement Legal fact
Rule 44 of the Mandela Rules defines solitary confinement as 'the confinement of prisoners for 22 hours or more a day without meaningful human contact.'
Mandela Rules prohibit indefinite solitary confinement Legal fact
Rules 43 and 45 of the Mandela Rules establish that indefinite solitary confinement is prohibited under all circumstances.
Mandela Rules: solitary only as last resort with independent review Legal fact
The Mandela Rules specify that solitary confinement 'shall be used only in exceptional cases as a last resort, for as short a time as possible and subject to independent review.'
UN Special Rapporteur Méndez: solitary over 15 days is torture (2011) Legal fact
In 2011, UN Special Rapporteur on Torture Juan E. Méndez declared that solitary confinement exceeding 15 days constitutes torture.
UN Special Rapporteur Melzer: prolonged solitary is psychological torture (2020) Quote
In 2020, UN Special Rapporteur on Torture Nils Melzer stated that 'prolonged solitary confinement amounts to psychological torture.'
Estimated U.S. solitary population 2014: 80,000–100,000 Statistic
In 2014, the estimated number of people in solitary confinement in the United States was 80,000–100,000.
80,000 people in solitary
Estimated U.S. solitary population 2016: ~68,000 Statistic
In 2016, the first Liman Center census estimated approximately 68,000 people in solitary confinement in the United States.
68,000 people in solitary
U.S. solitary population 2019: 31,542 in 39 reporting states Statistic
In 2019, 31,542 people were held in restrictive housing, representing 3.8% of 825,473 prisoners across 39 reporting states.
31,542 people in restrictive housing vs. percent of 825,473 prisoners in 39 reporting states
Estimated U.S. solitary population 2021: 41,000–48,000 Statistic
In 2021, the estimated number of people in solitary confinement in the United States was 41,000–48,000; the pandemic may have increased use.
41,000 people in solitary (estimated)
2019 solitary duration: 46% held 3 months or less Statistic
Of the 31,542 people held in restrictive housing in the 2019 census, 46% had been held for 3 months or less.
46%
2019 solitary duration: 11% held more than 3 years (~3,000 people) Statistic
Of the 31,542 people held in restrictive housing in the 2019 census, 11% (nearly 3,000 people) had been held for more than 3 years.
11% vs. approximate number of people
Over 3,000 prisoners with serious mental illness in solitary across 33 states (2019) Statistic
Across 33 reporting states in 2019, over 3,000 prisoners with serious mental illness were held in solitary confinement.
3,000 prisoners with serious mental illness in solitary
Solitary use rate ranges from 0% to 11% by state Statistic
The rate of solitary confinement use ranged from 0% to 11% of the total prison population depending on the state, with four states reporting that they held no one under restrictive housing conditions.
0%
Legislative reform acceleration: ~25 states introduced bills 2018–2020 Statistic
Between 2018 and 2020, legislators in approximately 25 states introduced bills to limit restrictive housing, with about 15 states enacting legislation.
25 states introducing bills vs. states enacting legislation
Since 2020: bills introduced in ~30 state legislatures Statistic
Since 2020, bills addressing solitary confinement have been introduced in roughly 30 state legislatures.
30 state legislatures with bills introduced
Seven states enacted solitary legislation in 2021 Statistic
In 2021 alone, seven states enacted legislation addressing solitary confinement: Arkansas, Colorado, Connecticut, Kentucky, New York, North Carolina, and Tennessee.
7 states enacting legislation in 2021
New York HALT Act limits solitary to 15 consecutive days Policy
New York's HALT Solitary Confinement Act (signed April 2021, effective April 2022) limits solitary confinement to a maximum of 15 consecutive days and defines solitary as 17 or more hours per day in a cell.
HALT Act prohibits solitary for specific vulnerable populations Policy
The New York HALT Act prohibits solitary confinement for those 21 years old or younger, those 55 or older, pregnant or postpartum individuals, those with disabilities, and those with serious mental illness.
HALT Act requires minimum 4 hours out-of-cell programming daily Policy
The New York HALT Act requires a minimum of 4 hours of out-of-cell programming daily and mandates evidentiary hearings for all solitary confinement placements.
HALT Act implementation: 40% held beyond allowed period (April 2024) Statistic
An April 2024 contempt ruling found that 40% of individuals in solitary under the HALT Act had been held longer than the law allows.
40%
HALT Act implementation: 24% held without sufficient evidence Statistic
An April 2024 contempt ruling found that 24% of individuals in solitary under the HALT Act were held without sufficient evidence meeting the evidentiary standard.
24%
New York correctional officers' strike March 2025 Case detail
In March 2025, a correctional officers' strike in New York led to temporary suspension of HALT Act programming elements.
Connecticut and Nevada enacted 15-day maximum limits (June 2023) Policy
Connecticut and Nevada enacted 15-day maximum limits on solitary confinement, aligning with the Mandela Rules, as of June 2023.
New Jersey 20-day maximum under Isolated Confinement Restriction Act (2020) Policy
New Jersey's Isolated Confinement Restriction Act (2020) established a 20 consecutive day maximum for solitary confinement.
Four states eliminated restrictive housing entirely (2019–2020) Policy
Colorado, Delaware, North Dakota, and Vermont no longer house individuals under restrictive housing definitions as of 2019–2020 reports.
End Solitary Confinement Act: 4-hour maximum federal isolation Policy
The End Solitary Confinement Act (introduced 2023, reintroduced 2025) would prohibit isolation except for a maximum of 4 hours in federal facilities.
First Step Act banned juvenile solitary in federal system (2018) Legal fact
The First Step Act (2018) codified a ban on juvenile solitary confinement in the federal system. This remains the only enacted federal legislation directly addressing solitary confinement.
Eleventh Circuit has no definitive ruling on solitary and Eighth Amendment Legal fact
The Eleventh Circuit, which governs Georgia, Alabama, and Florida, has not issued a definitive ruling on the constitutional limits of solitary confinement under the Eighth Amendment.
Third Circuit: 33 years of solitary can be cruel and unusual (Porter v. PA DOC) Legal fact
In Porter v. Pennsylvania DOC (974 F.3d), the Third Circuit found that 33 years of solitary confinement can demonstrate cruel and unusual punishment.
Fourth Circuit cited research showing negative effects after 10+ days Quote
The Fourth Circuit cited research showing that 'not a single study of solitary confinement lasting more than 10 days failed to result in negative psychological effects.'
Fifth Circuit: solitary does not violate Eighth Amendment regardless of duration Quote
In Hope v. Harris (2021), the Fifth Circuit held that solitary confinement does not violate the Eighth Amendment 'no matter how long it is imposed for, its impact on prisoner's mental and physical health, or rationale for imposing it.'
Supreme Court denied cert in Hope v. Harris (27 years of solitary) Case detail
In 2023, the Supreme Court denied certiorari in Hope v. Harris, involving Dennis Wayne Hope who had been held in continuous solitary confinement for 27 years (1994–2021), confined 22–24 hours per day in a 54-square-foot cell, receiving only one pers…
In re Medley (1890): Supreme Court recognized solitary's severe effects Legal fact
In In re Medley (1890), the Supreme Court recognized solitary confinement's severe psychological effects, noting prisoners fell into a 'semi-fatuous condition,' became 'violently insane,' or committed suicide. This 135-year-old case remains the most…
Dr. Craig Haney described Georgia SMU as 'one of the harshest and most draconian' Quote
Dr. Craig Haney described Georgia's Special Management Unit as 'one of the harshest and most draconian' solitary confinement facilities in the nation and 'as chaotic and out-of-control as any such unit I have seen in decades of conducting evaluation…
Haney warned of 'irreversible and even fatal harm' at SMU Quote
Dr. Craig Haney concluded that conditions in Georgia's SMU create a 'significant risk of very serious psychological harm,' particularly given the high number of prisoners with mental illness, and warned of the risk of 'irreversible and even fatal ha…
SMU cell dimensions approximately 6 feet by 9 feet Case detail
Cells in Georgia's Special Management Unit measured approximately 6 feet by 9 feet—roughly the size of a parking space—with solid metal doors having only a small glass window.
SMU most restrictive cellblocks: 22–24 hours per day confined Case detail
In the most restrictive cellblocks of the SMU, prisoners were confined for 22 to 24 hours per day alone, without books or personal property, and were prohibited from leaving their cells for a minimum of 90 days upon arrival.
SMU cells had no outside light due to exterior window shield Case detail
Cells in the SMU had no outside light—a small exterior window was covered by a shield.
SMU characterized by constant din, feces stench, dampness, mildew Case detail
The SMU facility was characterized by a constant din of yelling and banging, a permeating stench of feces, and dampness and mildew from in-cell showers. Meals were passed through a slot in the door.
SMU population July 2017: 182 prisoners Statistic
As of July 2017, 182 prisoners were held in Georgia's Special Management Unit.
182 prisoners in SMU
SMU duration: 44% held more than 4 years (July 2017) Statistic
As of July 2017, 44% (80 of 182) of prisoners in Georgia's SMU had been held for more than 4 years.
44%
SMU duration: 26% held more than 5 years (July 2017) Statistic
As of July 2017, 26% (47 of 182) of prisoners in Georgia's SMU had been held for more than 5 years.
26%
Timothy Gumm held in SMU for 7.5 years Case detail
Timothy Gumm was held in Georgia's SMU for 7.5 years. There had been 14 separate recommendations over 4 years that he be transferred out of the SMU, yet he remained.
Johnny Mack Brown held in SMU for 9 years Case detail
Johnny Mack Brown was held in Georgia's Special Management Unit for 9 years.
Robert Watkins held in SMU for 8–10 years Case detail
Robert Watkins was held in Georgia's Special Management Unit for 8 to 10 years.
Gumm v. Jacobs lawsuit filed 2015 as pro se complaint Case detail
In 2015, Timothy Gumm, serving a life sentence for rape, filed a handwritten pro se lawsuit challenging SMU conditions after 5 years in isolation. He had been placed in the SMU following a failed escape attempt in 2010.
2018: SCHR and Kilpatrick Townsend filed class action motion Case detail
In 2018, the Southern Center for Human Rights (SCHR) and the law firm Kilpatrick Townsend & Stockton LLP filed a motion for preliminary injunction on behalf of a class of prisoners in the SMU.
January 2019 settlement agreement: sweeping SMU reforms required Legal fact
The January 2019 settlement agreement in Gumm v. Jacobs required: minimum 3 hours out-of-cell time in common areas (in restraints) plus 1 hour outdoor recreation; within 6 months, 2 hours per week of computer time or educational classes and GED prog…
GDC claimed 40% reduction in restrictive housing population since 2017 Statistic
As part of the 2019 settlement, GDC claimed a 40% reduction in the restrictive housing population since 2017.
40%
Judge Treadwell quote: GDC running 'four-corner offense' with no intention to comply Quote
Chief Judge Marc T. Treadwell stated: 'It became clear to the Court that the defendants, in effect, were running a four-corner offense and had no desire or intention to comply with the Court's injunction; they would stall until the injunction expire…
GDC placed people in strip cells upon SMU arrival Case detail
The April 2024 contempt order documented that GDC officials placed people in 'strip cells' upon arrival at the SMU, taking their clothing and leaving them naked or near-naked for hours or days.
GDC compliance documents found falsified Finding
The April 2024 contempt order found that GDC compliance documents were 'not only insufficient but also unreliable'—officials falsified documentation.
Prisoner testimony: broken toilet, no mattress, no clothing, freezing temperatures Case detail
In the contempt proceedings, one prisoner described a cell where the toilet was broken and filled with feces and urine from prior occupants. He was forced to urinate in a cup and pour it in the sink, or defecate on toilet paper and dispose of it on …
Six prisoners testified about conditions in contempt proceedings Case detail
Six prisoners testified in the contempt proceedings about being denied showers, out-of-cell time, programming, cell cleanout, and access to kiosks and book carts.
Court appointed independent monitor at GDC expense Legal fact
The April 2024 contempt order imposed several penalties including appointment of an independent monitor at GDC's expense.
Court extended settlement agreement and ordered attorney's fees Legal fact
The April 2024 contempt order also extended the settlement agreement, ordered attorney's fees for enforcement costs, and threatened additional sanctions.
Smith State Prison: inmate held in shower stall for nearly 3 days, hanged himself Case detail
At Smith State Prison in Glennville, an inmate was held in a shower stall measuring 3.75 feet by 6.75 feet for nearly 3 days. The stall had no mattress, no toilet, no ventilation, no heat, and no water. The inmate ultimately hanged himself.
Housing in shower stalls dramatically increases suicide risk per corrections industry Finding
The corrections industry has long documented that housing individuals in shower stalls dramatically increases suicide risk.
DOJ civil investigation of Georgia prisons launched September 2021 Case detail
The U.S. Department of Justice launched a statewide civil investigation of Georgia's prison system in September 2021.
DOJ findings report published October 1, 2024 Case detail
The U.S. Department of Justice published its 93-page findings report on Georgia's prison system on October 1, 2024.
DOJ found queer/transgender prisoners placed in solitary after reporting assault Finding
The DOJ found that queer and transgender prisoners reported being placed in solitary confinement after reporting sexual assault or other violence, or because they were experiencing mental health crises—making solitary a punitive response to victimiz…
Vulnerable prisoners forced to sleep in hallways, shower stalls, or outside Finding
The DOJ found that vulnerable prisoners were forced to sleep in hallways, shower stalls, or outside after other prisoners used threats of violence to take their assigned beds.
DOJ: victims bled out from treatable stab wounds waiting for guard escorts Quote
The DOJ noted that victims of gang violence have 'bled out from treatable stab wounds, waiting for a guard escort,' illustrating how staffing shortages intersect with isolation practices to create compounding risks of harm.
AAG Kristen Clarke statement on Georgia prison conditions Quote
Assistant Attorney General for Civil Rights Kristen Clarke stated: 'Our findings report lays bare the horrific and inhumane conditions that people are confined to inside Georgia's state prison system. People are assaulted, stabbed, raped and killed …
GDC disputed DOJ findings Quote
GDC disputed the DOJ findings, claiming that the DOJ 'fundamentally misunderstands current challenges of operating any prison system' and noting that similar issues plague the Federal Bureau of Prisons.
DOJ report contained 82 recommendations Statistic
The DOJ findings report on Georgia's prison system contained 82 recommendations.
82 recommendations
Contempt order was 100 pages long Case detail
The April 2024 contempt order issued by Chief Judge Marc T. Treadwell was 100 pages long.
Virginia passed comprehensive solitary legislation in 2023 Policy
Virginia passed comprehensive solitary confinement reform legislation in 2023.
Massachusetts comprehensive restrictive housing statute Policy
Massachusetts enacted a comprehensive statute defining restrictive housing as more than 22 hours per day in a cell, requiring mental health screening, prohibiting placement for vulnerable populations, and mandating regular reviews.
Low staffing made outdoor exercise impossible at SMU Finding
Extremely low staffing levels at Georgia's SMU made outdoor exercise impossible except when tactical officers were temporarily present.
2026 Georgia gubernatorial race as advocacy window Policy
The 2026 Georgia gubernatorial race is identified as a critical advocacy window for pressing candidates on solitary confinement reform commitments.
Nelson Mandela spent 27 years in prison Quote
Nelson Mandela, for whom the Mandela Rules are named, spent 27 years in prison and called solitary confinement 'the most forbidding aspect of prison life.'
Dennis Wayne Hope: one personal phone call since 1994 Case detail
Dennis Wayne Hope, held in continuous solitary confinement for 27 years (1994–2021), received only one personal phone call since 1994.
Dennis Wayne Hope's cell was 54 square feet Case detail
Dennis Wayne Hope was confined 22–24 hours per day in a 54-square-foot cell during his 27 years of continuous solitary confinement.
Common state reform provisions Policy
Common provisions in state solitary confinement reforms include annual reporting requirements, demographic data collection mandates, limits on maximum duration, protections for vulnerable populations (those with mental illness, pregnant women, youth…
GPS recommended data gap: current SMU population data needed Data gap
GPS identifies a data gap regarding current SMU population data including duration of confinement, mental health diagnoses, and demographic breakdown, recommending open records requests.
GPS recommended data gap: independent monitor reports since April 2024 Data gap
GPS recommends requesting the independent monitor's reports filed since the April 2024 contempt order to assess whether SMU conditions have improved.
GPS recommended data gap: current staffing levels at Georgia Diagnostic Data gap
GPS recommends seeking current data on GDC staffing levels at Georgia Diagnostic and Classification Prison specifically.
GPS recommended data gap: cross-reference mortality database with housing data Data gap
GPS recommends cross-referencing its mortality database with any available housing assignment data to test the solitary-suicide correlation in Georgia specifically.
GPS recommended: investigate DOJ enforcement action status Data gap
GPS recommends investigating whether the DOJ has taken any enforcement action since the October 2024 findings report, or whether the case is heading toward a consent decree or litigation.
Gumm placed in SMU after failed escape attempt in 2010 Case detail
Timothy Gumm was placed in the SMU following a failed escape attempt in 2010. He was serving a life sentence for rape.
Madrid v. Gomez (1995): risk of harm for vulnerable inmates in Pelican Bay SHU Legal fact
In the landmark case Madrid v. Gomez (1995), concerning California's Pelican Bay SHU, the Ninth Circuit recognized a substantial risk of harm from solitary confinement for mentally ill or otherwise vulnerable inmates, though it did not find a catego…
Harden-Bey v. Rutter: Sixth Circuit dismissed after 3+ years solitary Legal fact
In Harden-Bey v. Rutter, the Sixth Circuit dismissed a solitary confinement claim after more than 3 years of solitary, requiring a showing of 'extreme deprivations.'
Solitary Confinement Reform Act (2024) introduced but not enacted Policy
The Solitary Confinement Reform Act (2024) would prohibit solitary for specific subpopulations and require 4 hours of out-of-cell time daily for all federal prisoners. It was introduced but not enacted.
Washington State 2024 study: three qualitative themes Finding
The 2024 Washington State study's qualitative analysis revealed three dominant themes among long-term solitary confinement prisoners: social isolation, loss of identity, and sensory hypersensitivity.
Sources
21 cited sources backing this research.
Primary
Academic
Primary
Academic
Primary
Official report
Federal Bureau of Prisons SMU placement data, 2022
Secondary
Gps original
GPS Research Brief, February 2026
Primary
Legal document
Gumm v. Jacobs Contempt Order April 2024
Primary
Legal document
Gumm v. Jacobs litigation filings
Primary
Legal document
Hope v. Harris, cert. denied 2023
Primary
Legal document
Primary
Official report
Primary
Academic
Primary
Data portal
Primary
Academic
Primary
Legislation
Primary
Legal document
Porter v. Pennsylvania DOC, 974 F.3d (2020)
Primary
Academic
Primary
Academic
Tublitz et al., 2025
Primary
Legislation
Primary
Official report
Primary
Academic
Washington State 2024 study on long-term solitary confinement
Key Entities
Organizations, people, facilities, and other named entities referenced in this research.
ACLU National Prison Project
[organization]
Clark v. Coupe
[case]
Correctional Leaders Association
[organization]
Craig Haney
[person]
Dallas Augustine
[person]
Dennis Wayne Hope
[person]
DOJ Investigation of Georgia Department of Corrections
[operation]
End Solitary Confinement Act
[legislation]
Federal Bureau of Prisons
[organization]
Finley v. Huss
[case]
First Step Act
[legislation]
Georgia Department of Corrections
[organization]
Georgia Diagnostic and Classification Prison
[facility]
Georgia Prisoners' Speak
[organization]
Gumm v. Jacobs
[case]
HALT Solitary Confinement Act
[legislation]
Harden-Bey v. Rutter
[case]
Hope v. Harris
[case]
In re Medley
[case]
Isolated Confinement Restriction Act
[legislation]
Johnny Mack Brown
[person]
Juan E. Méndez
[person]
Judith Resnik
[person]
Kilpatrick Townsend & Stockton LLP
[organization]
Kristen Clarke
[person]
Liman Center for Public Interest Law
[organization]
Liman Center/CLA National Census of Restrictive Housing
[program]
Madrid v. Gomez
[case]
Marc T. Treadwell
[person]
Natalie Pifer
[person]
Nelson Mandela
[person]
Nelson Mandela Rules
[legislation]
Nils Melzer
[person]
Porter v. Pennsylvania DOC
[case]
Prison Policy Initiative
[organization]
Robert Watkins
[person]
Smith State Prison
[facility]
Solitary Confinement Reform Act
[legislation]
Solitary Watch
[organization]
Southern Center for Human Rights
[organization]
Special Management Unit
[facility]
Stuart Grassian
[person]
The GDC Accountability Project, Inc.
[organization]
Timothy Gumm
[person]
U.S. Department of Justice Civil Rights Division
[organization]
Williams v. Secretary Pennsylvania Department of Corrections
[case]