So the prosecutors report was released about the events at Sandy Hook Elementary.
http://www.slate.com/blogs/the_slatest/2013/11/25/sandy_hook_final_report_year_long_investigation_can_t_say_why_adam_lanza.html
The full report is also at the above link.
If you recall, at the time of the shooting the gun lobby was busy trying to blame violent video games, the video game industry was blaming the mental health industry, and everyone was pointing fingers all around. However, the report highlights one very interesting thing about the shooter, he did love to play video games and his favorite one was....
Lanza's love of "Dance Dance Revolution":
The shooter liked to play a game called “Dance Dance Revolution” (DDR), which is a music video game in which the player stands on a platform, watches a video screen and moves his feet as directed by the video. A home version of this was seen and photographed in the shooter’s home. Several videos of him playing DDR were found on digital media taken from the home.
The GPS found in the home and reportedly belonging to the shooter indicated that he regularly went to the area of a theater that had a commercial version of the DDR game in the lobby. In 2011 and up until a month before December 14, 2012, the shooter went to the theater and played the game. He went most every Friday through Sunday and played the game for four to ten hours.
An acquaintance of the shooter from 2011 to June 2012 said that the shooter and the acquaintance played DDR quite a bit. They would play the game and occasionally see a movie. They did not play first person shooter games at the theater. The shooter had stamina for DDR and never appeared winded unless really exhausted.
I guess we can stop blaming violent video games in this case. Although, the game the shooter played does seem to espouse a "revolutionary" doctrine that could lead to instability. I think the movie and video game industry have a pretty solid leg to stand -on that they had nothing to do with this particular crazed shooter.