What kind of secret investigation just goes and asks for someone who's supposed to be hiding by their actual name? If she's trying to hide her existence, she would've probably used a new name, in which case anyone in the town who knows her actual name is likely someone who knows the circumstances behind her running away + changing her name and is unlikely to just point random investigators in her direction.
Unless she's just still using her old name, which seems like a huge mistake on her part.