Missing child Caylee

I`m still faithfully watching this story about the missing little girl in Florida.It seems as though the mother is not going to be charged with anything other than child neglect & writing bad checks.I can`t get through to Nancy Grace but what I would really like to know...my question to her would be,why doesn`t a police sketch artisit sit down with Casey & sketch a picture of the mystery nanny & her sister Samantha? Maybe that way if there is such a person people could be looking for her & all those protesters would have something to do.I really believe the nanny is made up,but what would it hurt to put a pic out there of her? Maybe that would make Casey crack some & tell the truth however unlikey that would be.