JWs have established progressive policies to investigate, and if proven, publicly reprove/disfellowship rank & file members, as well as it's leaders, for outrageous sins such as Child Abuse.
That is part of the problem! The Watchtower takes it upon themselves to do the investigation, try the facts, and administer punishment. Their obligation is to report it to the lawful authorities, without delay, without exception. Having somebody "reproved" or "disfellowshipped" is not the same as having them face the lawful punishment for their act. In particular, it doesn't place them on the sex offenders registry, a key method of protecting children from known offenders.
The Watchtower's "progressive" policy states the elders are to report when required by law, no more (they consider an anonymous call from a public telephone sufficient to meet that obligation). Victims and witnesses are warned that they would be "creating a division" if they make their own report after the elders decide not to (as they often do, because of the notorious "two witness rule".) In short, they have policies that look good on the surface, but are more about protecting their image than with justice for the victims.
Other churches adopt clear, no-excuses policies:
ARTICLE 4. Dioceses/eparchies are to report an allegation of sexual abuse of a person who is a minor to the public authorities.
Dioceses/eparchies are to comply with all applicable civil laws with respect to the reporting of allegations of sexual abuse of minors to civil authorities and cooperate in their investigation in accord with the law of the jurisdiction in question.
Dioceses/eparchies are to cooperate with public authorities about reporting cases even when the person is no longer a minor.
In every instance, dioceses/eparchies are to advise victims of their right to make a report to public authorities and support this right."