Yes, a few individuals in fact. One was an elder who had frequent parts during our circuit assemblies, the father of a friend. It was pretty shocking at the time, but eye-opening as well. He was given a memorial service at the KH due to his years of faithful service.
There is such irony in this kind of thing. Hopeful futures... Happy people.... Blessed by God.... but the truth is that even JWs have to deal with the same problems and emotional/physical imperfections the rest of us are plagued by. Sadly, some are pushed over the edge by the undercurrents of 'do more' or the extreme stress and alienation that occurs with DFing or losing faith in what they believed for a lifetime.