Su Wuming went to the Confucian Temple to investigate, and Jixiang and Donglang revealed that Uncle Duguya had threatened to kill Liu Youqiu.Su Wuming went to Uncle Duguya's house to investigate, and his neighbor revealed that Uncle Duguya sharpened his knife in the middle of the night and killed Qinghong.Su Wuming interrogated Uncle Duguya again, and Uncle Duguya denied the murder. The ancestral silver ingot hidden under the rice vat in the kitchen was also missing.