A comprehensive report of targeted school violence commissioned by the U.S. Secret Service and Department of Education concluded that more than half of attackers demonstrated interest in violent media, including books, movies, or video games. However, the report cautioned that no particular behavior, including interest in violence, could be used to produce a "profile" of a likely shooter.
The U.S. Department of Justice has funded research at the Center for Mental Health and Media at Massachusetts General Hospital to better determine what impact video games have on young people. Although it is still in the preliminary stages, this research and several other studies suggest that a subset of youths may become more aggressive after playing violent video games. However, in the vast majority of cases, use of violent video games may be part of normal development, especially in boys - and a legitimate source of fun too.