I've personally known two JWs that have killed themselves.
Back in the late 80's when I first joined up, a young lady in her early twenties used a shotgun while sitting in her car. It made no sense at the time. We spent time with her and her husband on fishing/camping trips. She was not yet baptized. Her husband ( widower ) never spoke of it and later would move to Alaska.
Recently while we were at the last Tahoe meet-up we got word that a JW man in his 30s overdosed on pain meds. He had been abusing them for quite some time while desperately attempting to pioneer or reach for MS.