Lawyers for the Aurora movie theater gunman say the results of a psychiatric evaluation show he is too mentally ill to face the death penalty.

In a motion filed last week, the lawyers ask that the death penalty be thrown out as an option in the murder case against James Holmes. The motion was one of five the defense filed last week under seal related to Holmes’ evaluation at the Colorado Mental Health Institute in Pueblo. Details about the motions emerged Friday on the case’s register of actions — a kind of table of contents for the case.

The results of the psychiatric evaluation, which will likely be the most important piece of information in determining the outcome of the case, have not been revealed, and the secrecy surrounding the arguments about it shows its significance.

One of last week’s defense filings is titled, “Motion to strike the death penalty because the state and federal constitutions prohibit the execution of individuals such as Mr. Holmes who suffer from a chronic and serious mental illness.”

Another motion asks the judge to limit testimony about the shootings’ impact on victims and their families until after jurors have decided the sentence. The motion’s title states that the evaluation’s conclusions “render such evidence irrelevant.”

Another motion asks the judge to block prosecutors from presenting at trial statements Holmes made during the evaluation, and another motion requests the judge to “exclude evidence and findings concerning competency to stand trial.”

Holmes is scheduled to go on trial in February on charges that he killed 12 people and wounded dozens more inside the Century Aurora 16 movie theater in July 2012. His attorneys have admitted he fired the shots, but Holmes has pleaded not guilty by reason of insanity to the charges — a plea that prompted the evaluation at the mental health institute.

Next month, attorneys in the case are set to argue about the constitutionality of the death penalty in weeks of hearings.