Washington: Lawyers for James Holmes, who allegedly killed 12 people during the screening of ``The Dark Knight Rises`` at a movie hall in Colorado, United States, have indicated their client might plead not guilty by reason of insanity.
According to court documents, Holmes` attorneys want the judge to declare portions of the state`s insanity defense laws unconstitutional.
The filings said the laws in which a defendant may waive their right to remain silent and reveal confidential medical information should be unconstitutional in cases involving the possibility of execution, The New York Post reports.
According to the Post, attorneys also said that not knowing whether prosecutors will seek the death penalty directly impacts what type of plea to enter at the March 12 arraignment or what type of defense to use.
Holmes has been charged with multiple counts of first-degree murder and attempted murder in the July 20 Aurora theater shooting.