Video: 'Witnesses describe what happened in the theater at the Aurora, Colorado shooting'

(Friday, July 20, 2012, 12:38-12:45 a.m. MDT; during the 2012 Aurora, Colorado shooting) — A gunman set off tear gas grenades and opened fire early this morning at a midnight screening of The Dark Knight Rises at a theater in Aurora, Colorado, killing 12 people and wounding 70 others, 58 of them from gunfire.

Video: 'Inside the theater of the Aurora, Colorado shooting'

It was the deadliest shooting in Colorado since the Columbine High School massacre in 1999. At the time, the event had the largest number of victims (82) in one shooting in modern U.S. history.

Video: 'Aurora Movie Theater Shooting 2012 James Holmes' Killing Spree Crime Documentary'

The accused killer, James E. Holmes, 24, was arrested minutes later in his car outside the cinema. Earlier, he had rigged his apartment with homemade explosives and incendiary devices. These were defused by the Arapahoe County Sheriff’s Office Bomb Squad a day after the shooting.

Holmes later pleaded not guilty by reason of insanity. In 2015, he was convicted on multiple counts of murder and sentenced to life in prison without the possibility of parole.