Although the Ionia Correctional Facility was once the state's only supermax prison, Michigan downgraded the facility from a level VI (or supermax) to a level V maximum security prison in 2004.

The remaining two are used for administrative segregation (a unit in which prisoners are confined to their cells for breaking prison rules), temporary segregation, detention, and secure outpatient treatment.

The level II facility consists of a 280-bed building separated into two units.

[3] This is where convicted murderer Carl Watts was serving his time before his death in 2007.

You can help Wikipedia by expanding it.This article about a United States prison is a stub.