"Personal Disorders, Agresivve behavior and self-mutilation, ECT, Substance-related disorders, Sexual Disorders, Forensic Psychiatry, Sleep Disorders"
http://www.ktu.edu.tr/katalog/web/tip/2.html
Given this information, it seems possible that this disturbed young man may have known about the name, "Ismail Ak," by being referred to him or his writings for psychiatric help. And if he wrote it on his own arm it's very possible that the "K" of "AK" could look like an "X."
President-elect:
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.