This, like many other similar events, happened long before the suicide bombers, before al-Quaeda, and long before 9/11.
The facts were checked and confirmed by our writer (Fernandinha) at both the Israeli Authorities and Israel Civil rights Group http://www.btselem.org/

The boy in the photo went, like everyday, to collect his sheep on the fields. As he wouldn't arrive, his elder brother (holding the memorial) went to look for him, just to find him dead, shot in the back of his head by Israeli soldiers.
His Father and Uncles went to pick the body, and the 3 went on to complain at the Police. All 3 were beaten and put to jail, indefinitely, to avoid revenge...
The younger Uncle was working at an Israeli company. He was later released from jail, to be in house arrest (job lost, for sure...). It was him who told us the story.
I took the photos of the unfortunate Family.
Justice? A mere and vague word in these places...
Guilty? The Boy for being in the wrong place at the wrong time...