In short, the surveillance footage and Luo Mingzhi's own confession both indicate that she is a prime suspect.
Thus, the police intensified their interrogation and entered the formal case filing process, but Luo Mingzhi resolutely denied having been to Jiaobide's apartment that night.
Even when shown the surveillance, faced with irrefutable evidence, she still stubbornly denied it and her emotions once collapsed, nearly halting the interrogation process.
The interrogators also felt something was off, leading to another speculation: post-traumatic stress response.
Luo Mingzhi's mental state had issues; for self-protection, her brain chose to block out that memory due to the immense shock and pain.
This conjecture seems far-fetched but appears to be the only plausible explanation...
