WASHINGTON — Violent video game play is linked to increased aggression in players but insufficient evidence exists about whether the link extends to criminal violence or delinquency, according to a new American Psychological Association task force report.

“The research demonstrates a consistent relation between violent video game use and increases in aggressive behavior, aggressive cognitions and aggressive affect, and decreases in prosocial behavior, empathy and sensitivity to aggression,” says the report of the APA Task Force on Violent Media. The task force’s review is the first in this field to examine the breadth of studies included and to undertake multiple approaches to reviewing the literature.

“Scientists have investigated the use of violent video games for more than two decades but to date, there is very limited research addressing whether violent video games cause people to commit acts of criminal violence,” said Mark Appelbaum, PhD, task force chair. “However, the link between violence in video games and increased aggression in players is one of the most studied and best established in the field.”

http://www.apa.org/news/press/releases/2015/08/violent-video-games.aspx

So yeah, really. The problem researchers have showing a connection to criminal behavior and delinquency is having to navigate a web of intervening variables that muddy up the correlations.