A little known fact is that until 2001 there were explicit rules in place, issued by The Vatican, to every bishop in the world, on how to deal with allegations of abuse.
These rules included a vow of the utmost secrecy under threat of excommunication, to be sworn by clergy receiving complaints AND sworn by victims.
In 2001 then Cardinal Ratzinger, sent another set of instructions to every bishop in the world, stating that allegations were to be dealt with "exclusively" by the church
and were subject to "The Pontifical secret", which means one risks excommunication by discussing matters of abuse outside of the church.
If you are interested in copies of these documents they can be found here:
1922 an 62 instructions from rome to all bishops in the world which remained rules until 2001
Letter from Ratzinger regarding abuse and "pontifical secret"
Text of the oath sworn by clergy and victims: "I will never for any reason directly or indirectly, by gesture, word,writing or in any other way and under any other pretext, even that of a greater good, or of a highly urgent and serious reason, do anything against this fidelity to secrecy, unless special permission or dispensation or dispensation is granted to me by the supreme pontiff".