I think part of the reason the public refuses to believe in the guilt of anyone convicted of a sex crime has to do with secrecy.

Reports involving minors are protected information and even if released are heavily redacted and often only the criminal conviction, charge, and sentence are revealed with an age range under the claim of protecting victims. However, who does that truly protect? When the victim publicly discloses in the future she or he will likely have no way of authenticating her claims.