A young girl, full of life an hour ago, lies dead in the gallery above.

We do not know her name; we do not know who killed her.

But there is some one here who does.

The man or woman who, wittingly or unwittingly, launched that fatal shaft, is present with us in this building.

This person has not spoken.
If he will do so now, he will save us and himself, too, no end of trouble.