The suspect in the Colorado shooting rampage tried unsuccessfully to call his university psychiatrist nine minutes before he opened fire during a Batman movie premiere, defence attorneys revealed in court Thursday.

James Holmes placed the call to an after-hours number at a hospital at the University of Colorado, Anschutz campus, where psychiatrist Lynne Fenton could be reached, defence attorney Tamara Brady said.

It wasn't clear why he called Fenton, and she wasn't immediately available to talk to him. Holmes, 24, is accused of opening fire during a midnight showing of The Dark Knight Rises, killing 12 people and injuring 58 others.

The detail about the call came out during a hearing about his relationship with Fenton, to whom he mailed a package containing a notebook that reportedly contained violent descriptions of an attack.

Notebook's admissibility questioned

Prosecutors asked the judge to let them review the notebook as part of their investigation, while defense attorneys argued it was inadmissible because it was protected by doctor-patient privacy laws.

Judge William B. Sylvester ruled that an ongoing doctor-patient relationship did exist between Fenton and Holmes, but he scheduled a Sept. 20 to revisit the notebook issue.

Fenton testified that she believed her privileged relationship with Holmes ended the last time she met with him, June 11.

But Brady brought up the call placed by Holmes in an effort to illustrate that the relationship was ongoing. With Fenton on the witness stand, Brady asked: "Do you know that Mr. Holmes called that number nine minutes before the shooting started?"

Fenton responded, "I did not."

Prosecutors noted Holmes also had Fenton's office phone number. He apparently did not try to reach her there.

University rejected Holmes

Meanwhile, the University of Iowa released records showing it rejected Holmes from a graduate neuroscience program last year after he visited campus for an interview and left the program director bluntly warning colleagues: "Do NOT offer admission under any circumstances."

It was unclear why Holmes' application was denied, and university officials wouldn't elaborate. But the application response was yet another window into a complex young man who was viewed as both brilliant and deeply troubled before the July shooting.

Holmes applied to the Iowa program in late 2010 and was given an interview Jan. 28, 2011, according to records released by the university. In his application, he painted himself as a bright student interested in improving himself and helping the world with a career in scientific research.

But two days after Holmes' interview, neuroscience program director Daniel Tranel wrote the strongly worded email urging the admissions committee not to accept him to the school.

The emails are among 12 pages of records the university released about Holmes in response to public records requests filed by The Associated Press and other news outlets.

None of the documents further explain why Holmes' application was denied. University spokesman Tom Moore said Thursday that Holmes was academically qualified but officials did not see him as a "good personal fit for our program." He declined to elaborate.

Admissions officials have no obligation to report potentially disturbed behavior from prospective students unless it amounts to a direct threat, said Reed, director of graduate admissions at Marymount University in Arlington, Va.,

Holmes later enrolled as a first-year Ph.D. student in a neuroscience program at the University of Colorado, Denver. He withdrew about six weeks before the attack in Aurora.