Authorities said attorneys for the Aurora shooting suspect called the University of Colorado four days after the attack and asked the school to return a package that James Holmes had sent to his psychiatrist.
University police chief Douglas Abraham made the disclosure Monday. It happened in a hearing where defense attorneys were trying to find out who told Fox News that the package contained a notebook with writing detailing violent plans.
Abraham and two other law enforcement officials said they did not discuss the notebook with members of the media.
Holmes was silent during the hearing. He is charged with killing 12 people and injuring 58 others in a crowded theater in July.