It was explained to the mother that FB-I could not delete the account on her request and she was provided with extensive information on how to engage with her daughter in relation to her concerns.
Facebook disables any false accounts it finds, and while it wipes all the information associated with the name from public view, it doesn't delete the account from its servers "for safety and security" reasons.
When a photo or video is deleted, or when a person deletes his or her account, we delete all of the metadata for the content as well as any and all tagging and linking information.