The jury, which heard nearly three months of testimony in the case, deliberated for a day and a half before arriving at a decision. Holmes had pleaded not guilty by reason of insanity.
Attorneys for James Holmes argue he was insane at the time of the 2012 attack that killed 12 people. Prosecutors, who are seeking the death penalty, say he knew the difference between right and wrong.
More than 1,000 days after James Holmes opened fire on an audience at a midnight movie premiere in Aurora, Colo., his trial began in earnest Monday with prosecutors arguing he was sane.
James Holmes is accused of killing 12 people and wounding 70 in the theater shooting in July 2012. He has pleaded not guilty by reason of insanity. The jury pool of 9,000 is one of the largest ever.
In response to the 2012 theater killings, Colorado added clinics, hotlines and mobile units to support early crisis prevention. At the heart of the initiative are 13 walk-in crisis centers.
In the weeks before the attack, James Holmes took photos of the Colorado movie theater where 12 people were killed and dozens more wounded in last summer's mass shooting, prosecutors revealed Wednesday at a court hearing in Colorado.