would imagine that the Watchtower has its own internal means of discovering the identity of Kevin McFee if they so wished. He uses his voice and I think his child's voice as well.
Just to say he's not a JW anymore and I don't think he has been for some time. I believe he simply has an elderly relative he doesn't wish to "complicate" things for. That person cannot shun him - but he knows the witnesses would simply be unpleasant to them and soft shun that person merely for being related.
Aren't they such a lovely bunch?!!
Great news, our kev!!