Prosecutors also amended five other counts that Holmes, 24, already faced. Details about the new charges were not made public.
Both sides also discussed whether they were ready for a preliminary hearing set for Nov. 13. A preliminary hearing is a probable-cause hearing where all the evidence in the case will be discussed.
On Thursday, the defense team for the man charged with killing 12 people in the Aurora movie theater shooting on July 20 said they would not be ready for the Nov. 13 hearing - as they have at least 18,000 pages of documents to sift through and expect thousands more to come forward. The attorneys also raised the point that they want to reconvene after the holiday season - possibly in January.
In addition, the judge heard from both sides regarding some previously-redacted information in documents. He is taking their arguments under advisement and will probably rule on whether the redacted phrases should be revealed on Monday.
The teams also talked about an open-records request with the University of Colorado - where Holmes was a student and reportedly sent a mysterious package to his psychiatrist. They plan to track down who leaked the contents of that package to many media outlets. Investigators claim there were a limited amount of people who knew the contents of it. They plan to discuss that further in an Oct. 25 hearing.
Daniel King - one of the defense attorneys for Holmes - said their team is still investigating the "depth of his mental illness."
(KUSA-TV © 2012 Multimedia Holdings Corporation)