What is the reason for [name withheld] having violent tendencies? What can be done to help?

This indeed is the consequence of a severe spirit manipulation. It is owing to the presence of not only a group of spirit meddlers but a hybrid human spirit working in collaboration with the spirit meddlers to create a state of inner imbalance, and manipulate this individual to darken his thoughts and ramp up dark impulses within him. This is simply an example of these dark spirits doing what they do because it is who they are, they simply cannot resist trying to manipulate and worsen the experience and life of their host to the greatest extent possible. So this makes the individual a risk to others as long as such spirits are in residence and gaining ground in controlling his thoughts and feelings and then actions as a consequence, so timely work with the Lightworker Healing Protocol would be a blessing.