Could this be the "L.L. Ellison" referred to in Benita Roth's SEPARATE ROADS TO FEMINISM? Roth writes about a Black woman, "L.L. Ellison" in Framingham State Prison who killed a prison guard in self-defense against sexual assault. Given the similarity in some of the details of the cases, Roth could have confused the wrongful conviction of Ella Ellison on the police murder charge. (I beleive Roth is drawing on a 1999 article by Duchess Harris in WOMANIST THEORY AND RESEARCH where the original error may have occurred -- unless there was a separate "L.L. Ellison."