Government has list of anti-depressant users!: Virginia Tech killer NOT on it

"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."

From

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

Seung-Hui Cho, 23-Year-Old Shooter, Wrote 'Disturbing' Note and Violent Plays

By NED POTTER, DAVID SCHOETZ, RICHARD ESPOSITO, PIERRE THOMAS and the staff of ABC News

April 17, 2007