No reason.
Logically speaking, if Wang Meili is the murderer, she couldn't possibly forget the process of killing.
Yes, unless she wasn't the one who killed, but if she didn't, then who did?
Though there are some logical issues with Wang Meili's stated motive for murder, she matched the details in the phases of disposing of the body and hiding Zhang Chao's disappearance.
From the current investigation results, Wang Meili confirmed that Zhang Chao was always living with them, and the records of Zhang Chao communicating with relatives through his phone are solid evidence.
To verify if these actions were done by Wang Meili, Wang Zhaokai and Chen Jiang asked her some specific details, and her answers matched up.
However, two key points raised issues. The first is the motive for murder.
Wang Meili said she killed Zhang Chao because he committed domestic violence after drinking.
