Why is FCC mum on violence in media?

James Tuthill writes for San Francisco Chronicle, January 17, 2013

Our debate about how to reduce gun violence in our country has focused almost entirely on gun control since the tragedy at Sandy Hook Elementary School. And that’s appropriate. But another critical element almost has been ignored: the harmful effect of violence in the media. Even more surprising is that the federal agency with knowledge of these effects has been mute on the subject.