Segal at the University of California, Berkeley, "Civil Commitment Law, Mental Health Services, and U.S. Homicide Rates, " found that a third of the state-to-state variation in homicide rates was attributable to the strength or weakness of involuntary civil-commitment laws.

WSJ: David Kopel: Guns, Mental Illness and Newtown

Third, the child with bipolar disorder often has a daily variation: he becomes highly active at night and in the morning he is like a hibernating bear, all but impossible to get out of bed.

NPR: Excerpt: 'Delivered from Distraction'