WATCH: How does a kid cope in life after accidentally killing his brother

When John Arthur Greene was 8, he and his brother played a game — with real guns. John accidentally killed his brother. 

I cannot imagine how you would. This is not only a parent's worst nightmare- losing a child, but to lose one at the hands of another must take an enormous amount of love, care, self-reflection, and contemplation to overcome. 

He turned to music to deal with his own guilt and pain, and to remember his brother in the songs he creates and sings. He competed in American Idol and shared his story with the world. 

This video is one of the most moving you will see today.