I've been debating for a while about whether to post this or not, but here goes.
Over the decades I've been serving as an elder I was fortunate enough not to have to deal with a child abuse case in the congregations I've served in. Until now (within the last year). Situation came up and I'm not going into detail about it but I will explain what the branch office did. We called as per the instructions in this letter and the response from the branch office with immediate: contact the authorities. The only issue they had with us calling was that we had not called the branch office soon enough and had not reported the issue to the authorities quickly enough. It was made clear that we should immediately (like when we hung up with the branch) report this (along with advice about the best way to report it) and that we should cooperate with authorities in their followup investigation and we could do so in the clear identifying ourselves as elders in the congregation. No cloak and dagger stuff. I had always worried that if a situation like this came up that I would have to choose whether to continue to serve as an elder or report the matter to the authorities and I had already decided that I would resign as an elder and report to and cooperate with the authorities, so this was a welcome relief.
I'm sure this comment will whip up a firestorm of other comments. I'm not saying that what the organization does is perfect; some things have been quite broken in the past. However, it appears that in this case what is happening is correct.