Florida is an “outlier” in prison systems across the nation when it comes to the use of solitary confinement, according to a 90-page federal lawsuit filed Wednesday that alleges the state Department of Corrections is violating the constitutional rights of inmates.

Attorneys with the Southern Poverty Law Center named the state agency and Secretary Mark Inch as defendants in the lawsuit, which contends state prison officials “discriminate against people with disabilities in its use of isolation” and are “deliberately indifferent to the substantial risk of harm caused” by isolation policies.