violence video games and movies are the cause of the violence today. it's knowm for a fact teens get curious of what they see in movies and due to their brain not mature they get tempted to do it in reality.
Kids ages 13-17 will see shoot-'em-ups, blow-'em-ups, high-tech violence, accidents with disfigurement or death, anger, and gang fighting. Point out that the violence portrayed hurts and causes suffering. They can always start killing people for no reason or steal from them or bank rop.