James Eagan Holmes (born December 13, 1987) is the man who committed the Aurora Theater Massacre. He killed 12 people and serevely injured 58 others at the premiere of The Dark Knight Rises. He was a PhD student at the University of Colorado and was a major in neuroscience.
He first threw tear gas into the crowd of moviegoers and continued to open fire upon them. He was carrying three types of firearms with him.
When arrested, he was wearing a full-body bullet proof vest, riot helmet, and gas mask. After being arrested, he warned the police he had rigged his room with booby-traps.