报道要点
Princeton搜救志愿者Marion Weiskopff与经过气味训练的骡Sonny，参与寻找2023年在亚利桑那失踪的Chelsea Grimm。私人调查人员希望在约400平方公里偏远地区找到线索，先前使用越野车、无人机及搜救犬均未有决定性结果。
背景与影响
Sonny在美国受训并参加过嗅闻比赛，骑乘搜索有助进入人行难达地形。此次它带领人员找到一块女鞋鞋底，但尚不能确认属于失踪者；暴雨泥泞随后令骑乘行动因安全暂停，团队希望天气转干后继续。
仍待确认
Princeton骑乘搜救组有五名受训志愿者，除一般资格外须完成额外60项任务。嗅闻并非该组现行正式认证技能，Sonny此次也是首次因这项能力受邀；报道不证明其已找到失踪者或解决案件。
来源：CBC News 原报道。大鱼新闻整理原创中文摘要；保留原网页刊发日期。
Marion Weisskopff and Sonny search the Arizona backcountry. (Marion Weisskopff)
Sonny the mule and Marion Weisskopff are handed an award for winning a scenting field trial in Oregon in 2024. (Marion Weisskopff)
A missing person poster for Chelsea Grimm seen in Arizona. (Marion Weisskopff)
Marion Weiskopff and Sonny, right, and her husband Don and his SAR-certified horse Mariah, left, search the Arizona backcountry. (Marion Weiskopff)
Private investigator Steve Fischer on the site of the search for Chelsea Grimm as mounted teams assemble. (@SF_investigates / X)
A piece of shoe that Sonny helped locate in the Arizona backcountry. (Marion Weisskopff)
The Princeton Ground Search and Rescue mounted team. (Princeton Ground Search and Rescue)
