《明史·列传·卷九十四》
郭勋因而写信送给马录祈求免查，马录不从，偕同巡抚江潮书写案状上报，并且弹劾郭勋包庇奸人扰乱法律。
勋为遗书录祈免，录不从，偕巡抚江潮具狱以闻，且劾勋庇奸乱法。
Guo Xun wrote a letter to Ma Lu praying for exemption from the investigation, but Ma Lu did not follow him, and he wrote a case together with the governor Jiang Chaoshu and reported it, and he also impeached Guo Xun for shielding the villain from disrupting the law.