Lethal injection
FSP has an inmate capacity of 3,946 in 6 housing units, housed at level 2, 3 and 5 security levels. The ADC uses a score classification system to assess inmates appropriate custody and security level placement. The scores range from 1 to 5 with 5 being the highest risk or need. FSP is the judicial site in Arizona for state executions since 1910. The death house is located beside Housing Unit 8. Lethal injection and the gas chamber are the sole methods of execution.