Sherlock didn't move. He simply watched the female officer with a disapproving look. Or he was just being British. Either or.
"You're looking for a child, aged eleven. Has had training with arms. Not biologically related to your other killer. Possibly abducted or suffering from Stockholm syndrome."
And then like a madman, Sherlock looked up at the sky and shouted, "There! May I leave now?"
Sherlock pulled out his mobile and began to text furiously.