she 'd killed seventy-three opponents in legal duels , another sixty or seventy in fights that were allegedly cases of self-defense , and rumor had it that another hundred mysterious murders could be laid at her feet with reasonable accuracy-and if she was anywhere near as good at covering up her crimes as she was at dodging the legal consequences of her swordplay , tavi figured that she might have killed who knew how many more , successfully disposing of the corpses afterward .