Some news accounts have suggested that Cho had a history of antidepressant use, but senior federal officials tell ABC News that they can find no record of such medication in the government's files. This does not completely rule out prescription drug use, including samples from a physician, drugs obtained through illegal Internet sources, or a gap in the federal database, but the sources say theirs is a reasonably complete search.

Sometimes things come out when you least expect them. Read this again, "federal officials tell ABC News that they can find no record of such medication in the government's files." I could be wrong, but that sounds an awful lot to me like the government is keeping track of everyone's prescriptions. Now where in the hell did that get green lighted?

ABC News: Killer's Note: 'You Caused Me to Do This'