Moreover, the reason why Xu He did this was because she was certain that under normal circumstances, the police at the time wouldn't scrutinize details closely as they would later. Most of the time, they would just let things slide. For any complicated case that didn't seem to have much impact on society, they wouldn't really put in too much effort and resources to investigate, often just giving it a cursory look. If they couldn't solve it, they would just hastily close the case.
Furthermore, Xu He had long harbored intentions. If the investigation turned up something, she hadn't touched the cookies at all this time. From purchasing to delivering, it was all done by Zhou Yunmei. It was unlikely that anyone would believe a mother would harm her own daughter, so in the end, it might be concluded as an unsolved case.
