"I would like to start a discussion about ending solitary confinement. I'd like to start a discussion about the removal of MO wings - an "MO" is a "Mental Observation" inmate - from Rikers Island, to be set up in mental health institutions. You can't put people in jail for having mental disorders."
Source : Thomas Yellowtail, Michael Oren Fitzgerald (1994). “Yellowtail, Crow Medicine Man and Sun Dance Chief: An Autobiography”, p.28, University of Oklahoma Press