The discussion of the role of the rabbi in dealing with abuse - reveals that there are four basic views. Without being aware of these different views - people tend to talk past each other even when they are using the same terms and citing the same halachic sources.
1) Rav Menashe Klein wrote a teshuva about how only rabbis know what to do. Rav Yitzchok Zilberstein asserted at a conference of psychologists (Click for recording) a year ago that only a rabbi knows and understands what abuse is and only he can is competent to judge whether someone is an abuser. He apparently views that psychologists have a limited understand of abuse as well as guilt because they have a secular viewpoint. In short an exclusive Torah background is the prerequisite for being qualified to deal with abuse and identify abusers. However not every rabbi who feels this way is willing to admit it - especially in the face of complaints from the secular authorities
2) The Aguda rabbis don't claim competence in understand the nature of abuse. But they do claim authority based on halacha to be the gatekeeper of the process. Thus the rabbis and only the rabbi is to decide based on reports or questioning of alleged perpetrator and victim and possible consultations with psychologists and lawyers - whether the police should be contacted or whether the matter should be dealt with exclusively within the Jewish community. This group manifests various degrees of fear.Some are afraid to say to go to the police - while others are afraid that it become known that they have permitted going to the police. There are also rabbis who are in group one but publicly assert this view - when under pressure from secular forces.
3) There are a number of rabbis - such as RCA 2011 Rav Herschel Schachter 2006, Crown Heights Beis Din , Vaad haRabbonim of Baltimore 2007 who have clearly stated that rabbis have neither the knowledge, competence or authority to deal with abuse. Those rabbis have stated that the secular authorities need to be contacted to investigate and punish the alleged or suspected abuser. These rabbis assert there is no prohibition of mesira in these cases and that the perpetrator has the status of rodef and thus it is simply an act of self-defense to contact the police. In addition - even if they are in agreement with view two - in the fact of mandated reporting laws = they publicly advocate compliance with the law of the land . Many of rabbis who accept this position - ask not to be named - although others aren't afraid.
4) Various combinations of the above three positions.