Anyone who commits murder has mental issues specifically related to impulse control and anger management.
That said the negative aspects in media really have a negative affect on people who are mental. Pornography and victim status and violent video games and cynical news might not affect a completely healthy person but it will have a chance at influencing a crazy person.
Look at that kid Lanza from Connecticut - he was online daily reading about serial killers. The guy who shot Lennon has admitted he did it for the notoriety murderers get in the news.
Take this kid he probably is listening to gangster rap music about killing cops and watching the news everyday hearing how he's a victim and white cops are looking to kill him. He probably thinks M. Brown held his hands up.
This country is out of control. There's no responsibility and there is so much negativity in society. It's all hate, violence, greed, laziness. You take the seven sins and you have america. Emphasize the gluttony. But that's all this country was built on.
Don't know how anyone can read the news and choose to have children in this cesspool.