《元史·列传·卷七十三》
沁州平民郭仲玉，被人杀害，有司以薄察山儿抵罪，旸得知是诬罪，跟踪索迹侦察得知杀人罪犯，山儿免死。
沁州民郭仲玉，为人所杀，有司以蒲察山儿当之，旸察其诬，踪迹得其杀人者，山儿遂不死。
Guo Zhongyu, a civilian from Qizhou, was murdered, and the authorities found Bo Cha Shan'er guilty of the crime. Yang learned that it was a wrongful conviction, tracked down the real murderer, and Shan'er was spared from death.