Twelve people were killed and 59 were injured in Aurora, Colo., during a sold-out midnight premier of the new Batman movie "The Dark Knight Rises". 

FIRST PHOTOS emerge of James Holmes, 24-year-old grad school dropout suspected of killing 12 and wounding 59 in theater shooting rampage. Cops say he wore a gas mask and booby-trapped his home with 'sophisticated' bombs. Read full story: 

24-year-old James Holmes allegedly unloaded four weapons' full of ammunition into the unsuspecting crowd.

The number of casualties makes the incident the largest mass shooting in U.S. history.

Holmes, a graduate student at a nearby college with a clean arrest record, allegedly entered the movie auditorium wearing a ballistics helmet, bullet-proof vest, bullet-proof leggings, gas mask and gloves. He detonated multiple smoke bombs, and then began firing at viewers in the sold-out auditorium, police said today.

Bullets from the spree tore through the theater and into adjoining theaters, where at least one other person was struck and injured. Ten members of "The Dark Knight Rises" audience were killed in theater, while two others died later at area hospitals. Numerous patrons were in critical condition at six local hospitals, the Aurora police said this afternoon. Read more;