Maybe you could start considering it from a group standpoint?

http://www.ncbi.nlm.nih.gov/pubmed/8726906

Getting a feeling for how many others have had similar horrors inflicted on them might help with feelings of isolation and hopelessness of ever being understood or knowing others who have struggled with the same life changing sort of situation?

If I were in your situation, I might try to get in touch with "authorities" or academics interested in the problems and difficulties of children and guns in this time and place and gradually ease my way into discussing the more complicated, emotional, psychological problems you experience; maybe see if I could find or form a group of other adults who have lived through such an event as a child?

Or maybe look at online groups who support post traumatic stress victims http://www.ptsd.va.gov/public/index.asp http://www.giftfromwithin.org/ and see if you can make a connection there? Many people here are victims of post traumatic stress caused by childhood abuse or sexual violence.