The problem with school shootings, like the problem with every other evil in our world today, is sin, plain and simple. Furthermore, our only solution to our sin problem is our one and only Savior, Jesus Christ. There is no such thing as a manmade law that can remedy humanity's lawlessness when it comes to the Laws of God. 

School shootings are not caused by guns in people's hands, but by sin in people's hearts. The culprit is not guns in our society, but "Eichmann in us all," as Yehiel Dinur, a survivor of Auschwitz once frightfully pointed out.