HONOLULU -- The man accused in the fatal stabbing of a Waianae teacher Friday was diagnosed as a schizophrenic by a court-appointed psychologist a few months ago who also attacked fellow patients at Hawaii state hospital, according to court documents.

Tittleman Fauatea has a history of mental illness going back at least six years, records show. Recent psychiatric evaluations reveal more details about his mental problems.

On Friday, Fauatea bought a foot-long kitchen knife at the Longs store at an Ewa shopping center, walked off without his change and then repeatedly stabbed Waianae High School English teacher Asa Yamashita, according to court documents.

Fauatea was arrested in June on suspicion of harassing a woman at an apartment complex in Ewa Beach, court records show. He was arrested again in August on suspicion of trespassing at a 7-Eleven convenience store in Kaneohe.

Authorities transferred Fauatea to the state mental hospital for evaluation, where he told staff that "...he believed midgets were reading his mind."

"He also reported that the television talks to him," but state hospital staff said his responses to questions were often "incomprehensible," according to court records.

A psychiatric evaluation said he was arrested three times in Las Vegas, had three psychiatric hospitalizations in California and also underwent mental treatment at Kahi Mohala on Oahu before going to the state hospital last fall for at least two months.

While he lived with an adoptive sister in California in 2003, he called 911 several times, with the false report that she was lying dead in bed, records showed.

Psychologists said Fauatea was prone to make verbal and physical assaults on people, suffered from paranoia and hallucinations, and would show inappropriate sexual behavior, which included "staring at girls, asking young children at the Laundromat for their phone numbers and touching himself in public."

When a psychologist evaluated him in October, Fauatea denied he was mentally ill. He said he did not think medication was helpful for him. Fauatea said the only medicine he needed was Advil. The court-appointed psychologist found him "not fit to proceed" to trial, saying he suffered from schizophrenia.

The report said he showed "hypersexual behavior, which is primarily flirting inappropriately with most all of the female staff and patients on the ward."

The court report also says the 25-year-old graduated with a certificate from Moanalua High School in 2002 and has only held two jobs since then, both of which he lost because he would not follow supervisors' orders.

A second evaluation by the same psychologist in mid-November found Fauatea "probably fit to proceed" to trial, saying he posed a "moderate" risk to himself and others because of delusions and hallucinations. That report noted that he assaulted three fellow state hospital patients in separate attacks on Oct. 29, apparently because he was angry that the court didn't release him from custody.