Mass murder myths: a prosecutor's report debunks misconceptions about the Sandy Hook massacre.

• Author: Sullum, Jacob
• Position: Columns - Column

In December 2012, less than a week after Adam Lanza murdered 20 children and six adults at Sandy Hook Elementary School in Newtown, Connecticut, the New York Post described his "eerie lair of violent video games," where he "obliterated virtual victims ... until the virtual became a reality." The Post reported that the troubled 20-year-old "was enthralled by blood-splattering, shoot-'em-up electronic games."

The official report on the massacre, released in November by State's Attorney Steven Sedensky, paints a more complicated picture. It casts doubt on the significance of Lanza's gaming habits as well as several other theories about why Lanza killed or how he could have been stopped.

Contrary to the impression created by stories focusing on Lanza's enthusiasm for violent titles such as Call of Duty, he enjoyed a wide variety of games. "One person described the shooter as spending the majority of his time playing non-violent video games all day," the report says, "with his favorite at one point being 'Super Mario Brothers.'"

Another game that "enthralled" Lanza in the months before the massacre: Dance Dance Revolution, which he played at a local movie theater for hours at a time every Friday, Saturday, and Sunday. If it seems absurd to portray Lanza's obsession with dance moves as a warning sign of the violence to come, it is only slightly less absurd to imply that "shoot-'em-up electronic games" enjoyed by millions of young people who never hurt anyone turned him into a mass murderer.

There is a similar problem with the theory that mental illness made him do it. "The shooter had significant mental health issues that affected his ability to live a normal life and to interact with others," the report says, but "whether this contributed in anyway is unknown." Lanza was anxious, isolated, socially awkward, rigid, and persnickety --traits his mother attributed to Asperger syndrome. But as The New York Times noted in November, "there is no evidence that people with Asperger's are more likely than others to commit violent crimes."

Nor were there signs before the massacre that Lanza himself was prone to violence. "Those mental health...