You’ve never met a lawyer like Martin Ehrengraf. He never loses a case, and rarely sees the inside of a courtroom. Nor does he pass his hours poring over dusty legal volumes, or searching the Lexis database. Ehrengraf is a criminal lawyer who takes cases on a contingency basis; he collects a fee only when his client goes free. And that somehow never fails to happen happens, because his clients always turn out to be innocent