[Valpal1]

Maybe the guy had been reading up on his possible mental illness diagnosis.

Professor Ismail AK,M.D. Head, Department of Psychiatry, KTU School of Medicine, Trabzon, Turkey
Ismail AK is Professor of Clinical Psychiatry at Head, Department of Psychiatry, KTU School of Medicine, Trabzon, Turkey
He is an experienced on clinical psychopharmacology of schizophrenia and bipolar disorders.

[muawiyah]

Yours is the most rational explanation. I’d suspect Cho read some of Doc. Ak’s books, and “sent him a message” ~

[SuziQ]

Maybe the guy had been reading up on his possible mental illness diagnosis.

That's what I've thought. Folks have been trying to connect this with terrorism. I've thought from the beginning it's just a case of a sad, angry young man who wanted to hurt others as much as he felt hurt.

[Treeless Branch]

Very nice find