It takes heart work.
I do believe it's possible and have seen the results from people who were simply praying for others. Another thing that any person can do is to visualize a person in his most happy and healthy state and wish for him the best course of action from the Universe. Don't take it upon yourselve thinking you know what it takes as you may be looking through the wrong filter. Criminal mind is unknown territory and if we knew the solution, the world would have less problems today.
Lightness in a heart is usually an indication of the right thoughts. It also feels like opening of the chest. Tears may come up and you feel great relief.
I was listening to a Russian doctor and psychologist Oleg Torsunov the other day and he was talking about a similar concept to help mothers to stop worrying about their rebellious sons. The idea was basically to switch the mind and take care of yourself spiritually to strengthen the soul. The stronger connection to the soul, the more energy the mother has to hold everything. This energy is what she also shares with others. Worry, stress, complains... weakens energy flow and mother's happiness heavily depends on other circumastances, including her children because they are her life. Returning to yourselves, or grounding as we call it, restores peace.
O.G. Torsunov believes that by achieving calmness and peace in a heart improves or heals destiny of a child. So if a mother is able to positively influence life path of her children through her heart, only imagine what that can do for us collectively.