While the photo Franny took at the detention center was not legal evidence, her showing the picture basically influenced the Judge into accepting the idea as legitimate because that person Phoenix was talking to had to be Maya Fey, but yet it didn't look like her.
The Judge was reluctant to accept it until he saw that picture.
--
"The great GF...Bahamut."
"...GF? I...? Using my powers...It is you humans...I fear..."