Henrietta Lacks as in the immortal HeLa cancer cell line? She didn't die well because of her the type of cervical cancer she had and the inadequate treatments available at the time, but she was by no means mistreated.
She was given the array of standard procedures of the time.
Stuff like the Tuskegee syphilis experiment, that's totally different. The case with Henrietta Lacks is nothing like that. Even if you do view it that way, her cells are getting their revenge on medical science anyway, but they've also done a great deal of good.