The Dedication of Suspect X

The once-in-a-century math genius Shi Shen's only pleasure every day is to go to a convenience store to buy lunch just to take a look at his neighbor Jingzi who works in the convenience store. Jingzi and her daughter depended on each other for life, but accidentally killed her ex-husband who came to entangle her. Shi Shen proposed that he take care of the aftermath. Shi Shen set up an incredible situation, so that the police could only focus on the periphery and were unable to get to the core of the case. What method did Shi Shen use? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.