Theater shooting trial: What we learned from the first witnesses

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3min 51sec
<p>(Sketch: Courtesy of Bill Robles)</p>
<p>Courtroom sketch of James Holmes</p>
Photo: Holmes courtroom sketch (AP) 1.20.15
In this courtroom sketch, James Holmes, left, and defense attorney Tamara Brady are depicted, as they sit in court on the first day of jury selection in Holmes' trial, at the Arapahoe County Justice Center, Tuesday, Jan. 20, 2015, in Centennial, Colo.

During the second day of the Aurora theater shooting trial, a series of witnesses emotionally described the attack by a gunman during a midnight movie premiere of "The Dark Knight Rises" three years ago.

James Holmes is on trial for killing 12 people and wounding 70 more in that attack. He's pleaded not guilty by reason of insanity. Here's what we learned so far: