Iron giant
Hero-witness
Hogarth
Because he was the first charecter to help the Iron giant.
Dean
Because he found the giant useful for something, and sides with the boy.
Two boys who almost fell to their death
Because they were saved by him.
Hero evidence
Bits of the destroyed missle
Because it's proof that the iron giant destroyed it as it will have his DNA/finger prints or something on it.
videoclip
Because it could show how he sacrificed himself.
Photos
Because it would show how he saved people.
Menece-witness
Kent
Because he thinks the iron giant is Russian.
Surviving piolet of air force
Because Iron giant almost killed him.
Genral
Because is army was basically destroyed by it.
Menece evidence
His gun
Because he shot people with it.
Army stuff remains
Because he destroyed it, and there'll be evidence the the Iron giant did it.
photos
Because they would show him destroying everything.