Wow. You are the coldest of cold. I understand what he did was wrong and is a sin, but it's not even known if this kid had a mental disability, and you're saying he knows better. You have no exact impression of him aside from what you heard. He needs psych care, and yes, some years behind bars. But he still deserves a chance.
And also, you're blaming video games, like everyone else in the world. The games weren't the problem. The problem was that he wasn't prevented from getting addicted. His parents were probably the kind to let him play all he wanted so he'd stay out of trouble. Can't really blame games for how he was raised, can you?