Fig. 4.

displays the total number of incidents each month (between January 2010 and December 31, 2019) in which an individual with a diagnosis of serious mental illness (i.e. schizophrenia, bipolar disorder, major depression, and/or PTSD) was placed in solitary confinement (i.e. sanctioned to disciplinary segregation or referred to administrative segregation) following a rule violation conviction. It shows a significant decrease beginning at the end of 2015 and a total reduction that was sustained through the post-reform observation period