The soul will be made non-existent with the aid of a drug. Taking a "sound point of view," people will invent a vaccine to influence the organism as early as possible, preferably as soon as it is born, so that this human body never even gets the idea that there is a soul and a spirit.Lecture 5
I have told you that the spirits of darkness are going to inspire their human hosts, in whom they will be dwelling, to find a vaccine that will drive all inclination towards spirituality out of people's souls when they are still very young,... This is merely to give you a particularly striking example of many things which will come in the near and more distant future in this field, the aim being to bring confusion into the impulses which want to stream down to earth after the victory of the spirits of light.
from The Fall of the Spirits of Darkness by Rudolf Steiner
Everything I've read about the Newtown shooter indicates that he might have been propelled by our buddies the Spirits of Darkness, who use people for wild orgies of violence and then discard them like a used tissue. The sheer monstrousness of the deed is hard to avoid, and this implies a will other than human. A brain disorder, psychiatric drugs and video games have been mentioned, but I suspect that these just help to get the human will out of the way so that Satanic spirits can move in. For more on this subject, see Andrea Yates and the Spirits of Darkness. They might have found this particular shooter to be useful precisely because he had an arsenal at his disposal. Also note the timing relative to major festivals in honor of Christ and Jehovah.