- However if someone had signed the letter they may have been to verify from the sender what exact issues (or boxes to tick, if you like) they require in order to take further steps.
This is crucial. And here comes where the Watchtower policies and culture come to play. Probably the elders were more concerned with the "good name" of Jehovah's congregation/organization, that they didn't want to become public knowledge that such a dangerous person was ever associated with them. They also didn't want the police ask questions about disfellowshipping policies and details. So, rather than filing a formal complaint, which would allow the police to follow through a more in-depth investigation, and potentially protect the members of congregation, they chose to protect the reputation of the Watchtower Corporation and instead send an anonymous tip to the police, in hopes that the angels would keep watch for them. We now know how well that went.