"Mea Maxima Culpa: Silence in the House of God", is a 2012 documentary film directed by Alex Gibney. The film details the first known protest against clerical sex abuse in the United States by four deaf men.
The film show that Cardinal Joseph Ratsinger, as Prefect of the Congregation for the Doctrine of the Faith (formerly the Inquisition), and later Bendict 16th, received all reports of child child abuse within the church and so knew more than anyone what was going on.
It may be sheer coincidence, as suggested by @Nicodemus, that Benedict 16th resigned just after the film was released.
The movie is out today and I am going to see it.