“There is no research to support that violent video games are linked to violent behavior or to crime,” says Scott Belshaw, a criminal-justice professor at the University of North Texas in Denton. “Research does not substantiate that at all.”
According to the report by two unnamed officials briefed on the Newtown shootings who spoke with CBS News, Lanza aspired to outdo Mr. Breivik, who hunted down and fatally shot 69 people at an annual summer camp of the Norwegian Labor Party's youth wing in July 2011. Lanza may have targeted Sandy Hook Elementary because it was the “easiest target” with the “largest cluster of people,” according to CBS News.
Investigators formulated this theory after finding news articles about the Norway shooting in the Lanza home and posited Lanza may have felt an urge to compete with Breivik. The reports suggest that Lanza wanted to exceed Breivik’s body count, not that he was inspired by the extreme right-wing ideology of Breivik, who called himself a "Christian crusader."