I think TE RE snuck up to her, banged her with the hammer, stabbed her with a cleaver, hung her up, and stabbed the knife in her head. Also her bow dropped so TE RE baked it. True Cannabalisim.
Killer: Cake (or Cyan)
The entry Pedro put was unnnesssecary. Cake would know what arsenic does because it could be on one of their databases. So she got REDBLUE and poisoned her with arsenic and put hydrocloric acid in his eyes. Then she knocked herself out. The reason It is Cake, not Pedro, is "why isn't she eaten?" and that's the main source why I belive it's Cake (or Cyan). [also C is for Cake or Cyan]