Vera killed herself in her room. After killing Lombard, she went into her room and there was a rope hanging from the ceiling and a chair under it. She stood on the chair and hanged herself. She was the only one in the island left after all the other guests on the island were murdered/died. She wasn’t murdered but she killed herself of her own volition because she felt guilty of the death of Cyril, the little boy who she once babysat.