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.