I still think it's Kelly, although it's been declared unlikely by some. I think that she may have defended someone important from the prison or had a close tie with one of the mallers. And for a while she was aiding a mutiny. Who knows what was conspired between the tenants in the background. She has redeemed herself in recent episodes, but that doesn't mean she didn't make a mistake back when she was miss thang. The wonderful thing is that Kc has given damn near everybody a motive to keep us guessing.