Originally published March 3, 2002 Elaine Brown calls it being “on the righteous trail,” and she rides it with a vengeance. With the same combustible passion that propelled her to the top ranks of the Black Panthers nearly 30 years ago, Brown – who lives now in Atlanta – has found another cause. In a book titled “The Condemnation of Little B” (Beacon Press, $24), she contends that 13-year-old Michael Lewis, aka Little B, was not guilty of the 1997 murder that earned him a life sentence.