The New Mexico State Penitentiary riot, which took place on February 2 and 3, 1980, at the Penitentiary of New Mexico (PNM) south of Santa Fe, was the most violent prison riot in U.S. history. Inmates took complete control of the prison and twelve officers were taken hostage. Several inmates were killed by other prisoners, with some being tortured and mutilated because they had previously acted as informants for prison authorities. Police regained control of PNM 36 hours after the riots had begun. By then, thirty-three inmates had died and more than two hundred were treated for injuries. None of the twelve officers taken hostage were killed, but seven suffered serious injuries caused by beatings and rapes.

There had been riots at PNM before it moved in 1956, the first occurring on July 19, 1922,Johnson, Judith R. (1994) "A Mighty Fortress is the Pen: Development of the New Mexico Penitentiary" pp. 119–132 In DeMark, Judith Boycw (editor) (1994) Essays in Twentieth-Century New Mexico History University of New Mexico Press, Albuquerque, New Mexico, , page 124 and the second on June 15, 1953.Johnson, Judith R. (1994) "A Mighty Fortress is the Pen: Development of the New Mexico Penitentiary" pp. 119–132 In DeMark, Judith Boycw (editor) (1994) Essays in Twentieth-Century New Mexico History University of New Mexico Press, Albuquerque, New Mexico, , page 128

Causes The causes of the riot are well documented. Author Roger Morris wrote that "the riot was a predictable incident based on an assessment of prison conditions." Prison overcrowding and inferior prison services, common problems in many correctional facilities, were major causes of the disturbance. On the night of the riot, there were 1,156 inmates in a prison that had beds for fewer than 963.Schmalleger, Frank and Smikla, John Ortiz (2001) Corrections in the 21st Century McGraw Hill, New York, page 317, First-time non-violent prisoners were not adequately separated from repeat violent prisoners. Many were housed in crowded, unsanitary dormitories. PNM's food was of poor quality, a problem which was exacerbated by the prevalence of cockroaches and mice. Intestinal diseases were common. A visiting warden reported PNM as the filthiest institution he had ever seen. Killed Another cause was the cancellation of educational, recreational and other rehabilitative programs.Mark Colvin, "The 1980 New Mexico Prison Riot", Social Problems, Vol. 29, No. 5, pp. 449–463, June 1982. When the educational and recreational programs were stopped in 1975, prisoners had to be locked down for long periods. These conditions created strong feelings of deprivation and discontent in the inmate population that would increasingly lead to violence and disorder.

Inconsistent policies and poor communications meant relations between officers and inmates were increasingly in decline. These patterns have been described as paralleling trends in other U.S. prisons as populations started to grow in the 1970s. The Attica prison riot was organized with solidarity among prisoners, demonstrated by their lack of interest in attacking one another, whereas the "snitch system" in the New Mexico Penitentiary pitted inmate against inmate, resulting in the distrust among inmates unless identified with a group.

Following a change in prison leadership in 1975, the penitentiary experienced a shortage of trained correctional staff. A subsequent investigation by the state attorney general's office found that prison officials began coercing prisoners to become informants in a strategy known as "the snitch game". The report said that retribution for snitching led to an increased incidence of inmate-on-inmate violence at the prison in the late 1970s.

There had been several disturbances at the prison prior to the riot. In 1976, a work strike was organized by inmates as a response to the prison's poor conditions. In an attempt to subdue the protestors, Deputy Warden Robert Montoya authorized the use of tear gas against the striking prisoners. As they exited the dormitory coughing from the gas, “they were stripped naked and run nearly a hundred yards down the central corridor through a gauntlet of officials who beat them with ubiquitous ax handles. Called 'the night of the ax handles', the incident was corroborated by several eyewitnesses, including some officials themselves, and resulted in serious injuries as well as a federal lawsuit, still pending in 1982, naming deputy warden [Montoya] and a senior guard captain among the assailants". After this violent response to prisoners' concerns, one inmate, Dwight Duran, was prompted to draft a 99-page handwritten civil rights complaint to the United States District Court for the District of New Mexico called Duran v Apodaca, later to become the Duran Consent Decree. There was ample evidence from over ten grand jury investigations (between 1977 through 1979) about the conditions at the penitentiary, but the PNM administration resisted the changes and the legislature refused to allocate the necessary funds to make changes. The last time the US District Court grand jury ordered improvements was in November 1979, two months before the riot.

There have been conflicting reports about the inmate population at the time of the riot and the official capacity of the prison that weekend. According to the Report of the Attorney General on the February 2 and 3, 1980, Riot at the Penitentiary of New Mexico (PART I: The Penitentiary, the Riot, the Aftermath - Appendix C1) published the June after the riot, the design capacity of the penitentiary was 1,058, based on the Phase II Technical Report: Facilities Inventory of the 1977 New Mexico Corrections Master Plan. However, that number included the 60 beds in Cell Block 5, which was closed for renovations. It also included the 24 beds in the Annex and the 32 beds in the Modular Unit, both outside of the main facility. The official number of beds available, therefore, on the night of the riot was actually 974, but even that number is hardly fair as it includes the 11 solitary confinement cells in the basement of Cell Block 3. The official population of the prison the night of the riot was determined to be 1,156.Jeff Bingaman, New Mexico Attorney General Report of the Attorney General on the February 2 and 3, 1980 Riot at the Penitentiary of New Mexico PART I The Penitentiary The Riot The Aftermath, STATE OF NEW MEXICO OFFICE OF THE ATTORNEY GENERAL (1980). Appendix C1

Hostages taken

The riot began with many of the prisoners intoxicated from homemade liquor they brewed inside the prison. Inmate Gary Nelson, assigned to E2 bunk 2, heard the plan to jump the guards if they did not lock the door to the dorm during the 1:00 a.m. count.

The routine for the count began with two officers entering the dormitory. A third officer was given all the other officers' keys and locked the door to the dorm until the officers were ready to come out. The dayroom was 60 feet all the way down to the far side of the dorm. The TV needed to be turned off and the dayroom locked. Because of overcrowding, the two officers went down two sides of a center aisle consisting of single beds the length of the dorm. As one officer looked down to the right between the rows of bunk beds, the other officer looked down to the left between the rows of bunks. At the last second, the shift commander entered E2 to help with the count. After he was let in, the officer outside the door did not latch it. The prisoners on the bunks by the door had to keep the door open, otherwise all they would accomplish was the taking of three officers locked in their own dorm.

On Saturday morning at 1:40 a.m., February 2, 1980, on cue, two prisoners in southside Dormitory E2 overpowered the officer before he closed the door. Including the officer manning the door, this meant the prisoners took four officers hostage. They also had escaped E2 dorm. They rushed out and overpowered the other officers engaged in shutting down the cell blocks at the south end of the prison. At this point the riot might have been contained if the grille to the south wing had been closed and locked. Officers Larry Mendoza and Antonio Vigil, who were eating breakfast in the officers' mess hall, heard men's voices in the main corridor. A prisoner in an officer's uniform was standing by the open grille, apparently guarding it. Approaching the grille marching north was a hallway filled with prisoners. The officers soon realized the vulnerability of the grille being open as this meant the path lay wide open for the inmates to attack the control center. They both ran to the control center and warned the officer of the situation. The north grille beside the control center had also routinely been left open most nights. The two officers took refuge in the north wing of the prison. The control center closed and locked the north grille behind them.

By 2:05 a.m. the inmates had gained complete control of the prison by smashing the supposedly bulletproof plate glass window of the control center with a heavy brass fire extinguisher. This gave them access to lock and door controls. However, since they did not know how to open the cell doors automatically from the control center, Cell Houses 1, 2, and 6 had to be opened manually.

Violence ensues

Events spiraled out of control within the cell blocks in large part due to the actions of two gangs. The first were the Chicanos, who protected each other and dished out targeted retribution for specific grudges. The other gang was loosely labeled the Aryan Brotherhood and was led by some of the most dangerous inmates (who by this time had been released from segregation in Cell Block 3). They decided to break into Cell Block 4, which held prisoners labeled as informers. Cell Block 4 also housed inmates who were mentally ill, convicted of sex crimes, or otherwise vulnerable, and held a total of 96 prisoners. Initially, after taking over the control center, the call was to immediately take revenge on the snitches at the far north of the prison. However, to get there, they had to pass the Psychology Wing. Multiple prisoners broke in to find stores of drugs purchased in bulk. The drugs were not only consumed but emptied into shoe boxes to distribute to the other prisoners. Then they set a fire in the psychology office in order to destroy the psychology records that had been used to keep some prisoners from obtaining parole.

The first to arrive at Cell Block 4 found they did not have the keys to enter the cellblock. The rioters found blowtorches in nearby Cell Block 5, which had been brought into the prison for construction purposes. They used the blowtorches to cut through the security grilles into Cell Block 4 over the next five hours. It was going to take hours to cut through the bars to enter the cell block, so several inmates left to raid the records office to look for files that would identify who the informers were. Before sunrise Friday, rioters with walkie-talkies began detailing their plans to harm those in Cell Block 4 to prison officials over the radio, but no action was taken. One official stated, "It's their ass," when overheard speaking about the men in the segregation facility. Locked in their cells, the segregated prisoners called to the State Police outside just beyond the fence, pleading for them to save them. Waiting officers did nothing despite there being a back door to Cell Block 4, which would have offered a way to free them. As the door was intended only for emergency use and therefore never opened, the keys were not readily available. State police agreed with the prison negotiators not to enter the prison as long as the officers being held hostage were kept alive.