Professionals from various disciplines look for a common thread for the purpose of possible prevention of future episodes of such tragedies. The shock and sorrow affects us all.
The cause, a disturbed mind, certainly distills the problem into the mental realm, making it apparent that the remedy, the safeguarding, must be in a way that addresses and reaches thought. Nothing occurs but that it is first in thought.
WHAT CAN WE DO? Consider that the one Source of all conscious awareness is the one intelligent Creator, or Mind of God. Prayer that affirms this one Intelligence to be all-good and all-powerful begins to immediately radiate out to all mankind in truth that produces only good.
Rather than condemn individuals, pray that the light of Mind, the Christ, rises up in their consciousness to destroy the disturbance or darkness that leads to criminal and violent acts.
The one Creator loves all of His own children, and that Love shines in the most dismal blackness. The light of Love shines in the consciousness of one who might contemplate violence to negate that suggestion before it ever takes hold and turns to action. The light of Love shines in the consciousness of any who have been victimized to lift them to His bosom by His great heartbeat of affection. The light of Love does wonders, it heals, it forgives, it protects, it prevents, it comforts, and it restores. Be still and breathe in the radiance of this Light, then see it softly resting on everyone everywhere.
Your prayer, your affirmation of truth, is not in vain, but powerful and saving.