Interesting that the articles are available on jw.org. The "do nothing" message comes through loud and clear. There is nothing said about making sure the abuser is removed from the child's proximity or that steps should be taken to make sure the predator doesn't keep doing it to someone else. As far as reporting it to the police, this is all that is said:
Some legal experts advise reporting the abuse to the authorities as soon as possible. In some lands the legal system may require this. But in other places the legal system may offer little hope of successful prosecution.
A JW will read this and understand it as saying "You can't expect Satan's system to do anything about it so don't bother." In the accompanying article about abuse in the family, there was absolutely nothing about removing the child from the abusive parent's reach. Instead, the advice is for everyone to read the OT prohibitions on incest in the family!