Actually, Susan did talk. She talked to her cellmates when she was in jail on other charges. When they turned her in, she made a deal with Bugliosi for her testimony. She testified in front of the grand jury, and then recanted. Bugliosi, who had discovered Linda by then, was actually relieved that he could take the deal with Atkins off the table. He found her sickening, and preferred to deal with Linda, who hadn't actually, you know, stabbed anyone.