Certainly, Renping Kuniaki had indeed brought Xiu Xin into the Special Investigation Headquarters, but he still harbored ill intentions, appointing him as the Deputy Director of the Special Investigation Headquarters.
After all, this case had a very bad impact.
Previously, the pressure to solve cases always came from ordinary citizens, from the bottom up; but for this case, if they couldn't crack it, the pressure would be top-down, from officials.
As everyone knows, the way to be an official is to flatter those above and bully those below. One can disregard the difficult people at the bottom, but one must satisfy the demands of the upper levels to make progress.
Therefore, if the case couldn't be solved in the end, someone would definitely have to take responsibility. Deputies are there to do the work and shoulder the responsibility, and it would also shatter the legend of Xiu Xin's invincibility in solving cases, bringing him down from the clouds.