Port Arthur, Texas -- In the middle of Joshua Bush's forehead, two inches above his eyes, lies the evidence that prosecutors say could send the teenager to prison for attempted murder: a 9 mm bullet, lodged just under the skin. Prosecutors say it will prove that Bush, 17, tried to kill the owner of a used-car lot after a robbery in July. And they have obtained a search warrant to extract the slug. But Bush and his lawyer are fighting the removal, in a legal and medical oddity that raises questions about patient privacy and how far the government can...