Ethics leader and law professor Lawrence Lessig will speak on "Speech and Independence: The Wrongs of Corporate Speech," during the 19th Annual Hugo L. Black Lecture on Freedom of Expression. The event is at 8 p.m. April 7 in Memorial Chapel. Lessig is professor of law at Harvard Law School and the director of the Edmond J. Safra Foundation Center for Ethics. As director, Lessig is leading a five-year project studying “institutional corruption” relationships which are legal, even ethical, but which weaken public trust in an institution. Prior to Harvard, Lessig was a professor at Stanford Law School, where he…