Police responded to a shooting at the Century 16 movie theater in Aurora, Colorado, early this morning. (Karl Gehring / The Denver Post via nbcnews.com)
A black-clad gunman wearing a gas mask opened fire on the audience at a midnight showing of "The Dark Knight Rises" near Denver on July 20, 2012, leaving 58 people injured and 12 dead in a scene of "mass chaos," authorities and witnesses said. Suspect James Eagan Holmes, 24, was arrested in a parking lot at the theater.
On July 30, Holmes was formally charged with 24 counts of murder and 116 counts of attempted murder. - AP, NBC News