1990 Strangeways Prison riot administrative offices on the lower floor and the chapel on the upper floor. Remand prisoners were held in wings G, H, I and K of a separate prison, linked to the main prison through workshops and a kitchen. The Certified Normal Accommodation Figure for Strangeways, the number of prisoners the prison was designed to hold, was 970. The population of the prison had increased in the months before the riot, from 1,417 in January 1990 to a peak of 1,658 on 27 March. On 1 April, the prison contained 1,647 prisoners – about 925 convicted adult prisoners, 500 remand prisoners
Apodaca prison riot the prison during the riot. Four days later, however, the new figures of the fugitives went down to 29. On 16 March 2012, the Attorney General's Office of Nuevo León confirmed that 37 prisoners had actually escaped on the day of the massacre. One of the fugitives, Óscar Manuel Bernal alias "La Araña" (The Spider), is considered by the Mexican authorities to be "extremely dangerous," and is believed to be the leader of Los Zetas in the municipality of Monterrey. Some other fugitives were also leaders in the organization. The fight broke out around 2:00 am local time between inmates