Referencing the 2010 Elder's Manual "Shepherd the Flock of God", Chapter 12, section 23, pg 133-134:
23. However, there are legal matters over which the congregation does not have authority and which may therefor be taken to a secular court for judgement without violating the principle of the spirit of 1 Corinthians 6:1-8. These include:
* Getting a divorce decree, child custody and support, alimony.
* Obtaining insurance compensation. If a person suffers loss or is injured in or by an automobile owned by a spiritual brother, it might be necessary legally to sue the brother in order to obtain compensation by the brother's insurer.
* Being listed among creditors in bankruptcy procedures.
* Probating wills.
* Certain countersuits. For example, if a worldly creditor sues a brother, for his own protection, to file a countersuit even though spiritual brothers may be included in the action.
* If a brother takes legal action against another baptized Witness, it would not be a violation of 1 Corinthians 6:1-8 for the one being sued to defend himself or to countersue. This is true whether the matter was first taken before the elders or not.
Section 23 deals with the only exceptions to a Witness taking another Witness to court. You will notice that there is no mention of criminal activity. Section 22 deals with detailing why you shouldn't take a brother to court. This one is clever in placement as sections 18-21 deal with handling reports of child abuse.
Section 18: "Immediately call the branch office." There is no mention of contacting the police in this section. The Elder is instructed to take direction from the Branch Office Legal Department according to "circumstances" (read HOW MUCH INFO THEY NEED TO COVER UP).
Section 19: "Never suggest to anyone that they should not report an allegation of child to the police or other authorities." There is no mention of suggesting that the victim should go to the police. It actually goes on to say that only if the elder is asked, to tell the child or his/her parent that deciding to report the matter to police is a personal decision. Mind you, these days, accepting blood transfusions is referred to as a personal decision.
Section 20: "When a know child molestor moves to another congregation, the Congregation Service Committee should send a letter of introduction with full and complete information about his background and current situation." These words are why the Watchtower Society is legally accountable for the actions of Gonzalo Campo.
Section 21: You have to see this with your own eyes to believe it. Page 132 says that if he denies the accusation, pretty much see if he's had any other sexual issues (outside of molesting kids) and decide if he's trustworthy around children. Page 133 requires them to ask questions about the accuser to determine if he/she has a history of dishonesty or mental issues, then asks if the accuser's family is known for lying or if they're all in good standing. Seriously not kidding about this. They are to decide if the molester is okay around other kids and if the molested is just a little attention seeking liar...specifically.
Then take into account that when judicial committee investigations rule in favor of the accused (as they are to do), there are numerous situations where the victim is told that the brother is found not guilty in the eyes of Jehovah and that further accusations of this man to other brothers and sisters in the congregation amounts to slander (an offense that merits a Judicial Committee hearing). So...yeah. No real encouragement or incentive among the Witnesses to report the issue to the police.