Gov. Haley Barbour of Mississippi acknowledges that Clyde Kennard suffered a grievous wrong at the hands of state officials more than 45 years ago. But he says he will not grant a posthumous pardon to Mr. Kennard, a black man who was falsely imprisoned after trying to desegregate a Mississippi college.

Mr. Kennard moved home to Hattiesburg, Miss., after seven years in the Army in Germany and Korea and three years as an undergraduate at the University of Chicago. He wanted to finish his education at the local college.