Actually, in cases of domestic violence, it is not unusual for the victim to later approach the police and ask that the matter be dropped. The big problem, however, is that many victims of domestic abuse feel coerced by the perpetrator to drop the charges or they feel guilty that their loved one has been arrested. The topic of guilt among victims is a separate topic!
Due to women's advocacy groups, legislation now requires police to take the prosecution to court regardless of the victim's entreaties. It is now rightly treated as a serious criminal matter that does not require the victim's consent.
The JW angle is interesting but perhaps not entirely relevant to the case - except to reveal how far they are from being sterling citizens. Sadly, the same problems that afflict nonJWs also afflict the JWs.