OAKLAND (AP) — A judge has ruled that an Alameda County jury will have the final say on whether a mentally ill man is competent enough to stand trial for a 2012 massacre at a small nursing college.

One Goh is charged with murdering six former classmates and a receptionist at Oikos University, a religious school with a nursing program that caters to Korean nationals. Authorities say the 46-year-old former nursing student planned the attack at the school after a tuition dispute.

Goh has been treated at Napa State Hospital since a judge in January 2013 declared him not mentally fit to stand trial.

The Oakland Tribune reports (Friday that the competency trial is scheduled for September.

Goh has been diagnosed with schizophrenia, severe depression, and a delusional disorder.