The trial over a vehicular rampage and stabbing spree on Guam a year ago that left three Japanese dead and several others injured has yet to begin after the defendant waived his right to a speedy trial and claimed mental illness as his defense.

Judicial official Joshua Tenorio said by email that the "significant delay" in the prosecution of Chad Ryan De Soto is "because of the need for psychiatric experts that can conduct psychiatric and forensic evaluations."

De Soto has pleaded not guilty to the multiple murder and attempted murder charges, citing mental illness. He has undergone two psychiatric assessments so far, but the court sealed the results from the public at the request of his lawyer.