Given the increasing intensity and widespread popularity of the rumors surrounding Wen Nian's case in Hai City, it became imperative to take swift action to counter and refute these rumors officially. This should be done as soon as possible!
It is true that sensationalized news and the private lives of public figures tend to capture people's attention more easily. Such news tends to spread quickly and widely. Over time, most people may even ignore mundane or ordinary truths.
The police recognized the importance of safeguarding Wen Nian's reputation. If they solely relied on identifying the mastermind as the criterion for closing the case, it would delay Wen Nian's ability to obtain an immediate and credible statement to refute the rumors.