Lu Qingqing remembered that the statute of limitations was only twenty years, and to pursue a case beyond that period she had to apply for approval from the highest prosecutorial authority, there was also a special statute of limitations system.
In reality, there were many examples of murderers still being brought to justice even after the statute of limitations had passed, as if once the public security organs had filed a case for investigation, no matter how many years had passed, they could still prosecute to the end.
As to the specifics of how to handle it, that depended on the lawyer's skill. The legal departments of the two major groups weren't for show.
It was within reason for Song Xiufeng to now file a lawsuit, as he had over twenty years of medical records proving he had lost his memory and only recently recovered it, holding a distinct impression of the perpetrator; naturally, he could seek accountability.