Witnesses in the Colorado theater shooting trial are adding vivid and disturbing details to the accounts of mayhem inside the auditorium.

In the trial's third day Wednesday, prosecution witnesses described a nightmarish scene with bloody victims, noxious smells and blaring noise.

Prosecutors appeared intent on planting a deeply upsetting image in jurors' minds. A day earlier, moviegoers testified about being shot or watching loved ones gunned down.

Twelve people were killed and 70 injured in the July 20, 2012, attack.

Attorneys for defendant James Holmes acknowledge he was the shooter but say schizophrenia distorted his sense of right and wrong. He pleaded not guilty by reason of insanity.

Prosecutors say Holmes knew what he was doing was wrong and should be convicted of murder. They're seeking the death penalty.