邓廷桢在清嘉庆年间出任西安知府。一天,汉中报上一桩投毒杀人案:兵营中有个名叫郑魁的士兵,被指控将砒霜放在馒头里,毒死了县民宋某。郑魁已低头认罪,被判为死刑。卖馒头的、卖砒霜的都作为证人被带至西安府。衙门上下都认为铁证如山,唯独邓廷桢感到 Deng Tingzhen Jiaqing in Xi’an during the prefect. One day, the Hanzhong News reported that a poisoned murder case was: a soldier named Zheng Kui in the barracks was accused of putting arsenic in a bun and poisoning a citizen of the county, Song. Zheng Kui has bowed his head to confess guilt, was sentenced to death. Selling bread, selling arsenic cream were taken to Xi’an as a witness. Yamen all think irons up and down, except Deng Tingzhen feel