Overseas, most papers, when they are unable to contact someone, will at least write that "so and so could not be reached for comment." Only by so doing can you meet reasonable professional standards.
國外一般新聞報導在找不到當事人發表意見時，通常都會加上「記者未能找到當事人評論」之類的話，只有這樣，才符合專業倫理。