The very fact that these guys were charged with the crime of stealing the diary is proof that it is real and Ashley's accounts of sexual assault by her father are true.
The accounts are true or else she is a pathological liar like her asshole father and the rest of the Biden family.
However, seeing all the filthy pedro shit Potatohead has done with other children, see him kissing his granddaugher on the mouth in public, accusations of rape by other women and the accounts of sexual harassment of the female Secret Service agents makes me to be certian she is telling the truth.