This is a still from the video game “Call of Duty: Modern Warfare 3.” Violent video games were cited as an aggravating factor by some even before it was discovered that Adam Lanza was an avid fan of the “Call of Duty” franchise. Lanza, 20, was the gunman who took the lives of 20 children and six educators Dec. 14 at Sandy Hook Elementary School in Newtown, Conn., before turning the gun on himself. (CNS photo/Activision) (Jan. 14, 2012) See MEDIA NOTEBOOK Jan. 14, 2013.