What is one reason for lockup in the Administrative Segregation Unit?

In the context of the Administrative Segregation Unit, an individual may be placed in lockup primarily because they present an immediate threat to the safety of staff, other inmates, or themselves. This can involve behavior that is violent, disruptive, or poses a significant risk to the security of the facility. The purpose of administrative segregation is to separate individuals who are deemed too dangerous or unpredictable to remain in the general population, thereby ensuring the safety and security of the environment within the correctional facility.

The other options do not accurately reflect the criteria for placement in the Administrative Segregation Unit. A voluntary leave of absence is not a reason for lockup, as it implies a choice made by the inmate rather than a response to behavioral issues. Good behavior would not lead to administrative segregation, as it typically results in privileges or opportunities for the inmate. Lastly, a lack of available beds in the library is unrelated to the classification or placement of inmates within a secure environment, highlighting a need for resources rather than safety concerns.