Terrible Familey Tragedy, Any Coping strategies that could help?

On Septtember 10,2009 our son Kevin took his own life when he stole his grandfathers pistol and shot himself due to him being severly bullied. He was being bullied severly throughout all of elementary and I let him switch schools which didnt help. I talked to teachers nothing would help. I said it would gradually go away when he entered highschool but it got worse as the days went on. I saw him come home on days he would just be upset in his room listening to sad music. There would be days where I would cry myself because of what he was going through. We tried seeking a counceller but nothing helped. As I came home from a hard day of work after picking up my wife from work as well we found our son dead in the living room with his grandfathers pistol in his hand. He wrote a letter writing all the names of the bullies which were the "popular kids, Jocks/cheerleaders" as he reffered to them as. We are devastated by this tragedy and want to take some action on this. We have extremly fallen in a state of depression. Please suggest some coping strategies as my wife and me will be gratefull.