"Don't underestimate her," Nanli said, "the smarter someone is, the better they are at disguising themselves. Perhaps she is proficient in both sorcery and the Bewitched Worms Technique."
Qin Zheng, having handled many cases, understood this principle well. If Xue Shengnan had no intention of marrying Song Zihan, she certainly had a motive for murder. However, he still found it hard to believe that Xue Shengnan, who had spent years in a noblewoman's chamber, could be proficient in these arts. Learning even a little bit of them would be impressive.
Nanli intended to return to the Marquis's mansion to rest, so Qin Zheng took the opportunity to investigate how many servants of the Xue family had died in recent years. Most had met accidental deaths and their bodies returned home for burial. Following protocol, despite some families having objections, Qin Zheng was obliged to exhume their remains.