"Already retired, Mahony would defy his predecessor's order to withdraw from administrative and public duties because of 'his failure to fully protect young people entrusted to his care.'"
How did Manning (d.1985) order Mahony to do anything?  Or should it read "successor's order"?
But for the ultimate paragraph, which seems a bit gratuitious, I can only largely agree.  Much has been done, but much is yet to be completed.