Blood Stains Under the Raincoat

In the Jiangcheng demolition area during the rainy season, in the surveillance video of Mrs. Wang's disappearance, the man in a blue shirt was always hanging around the edge of the camera. When the police found half a rusty button in the ruins, they found that it was exactly the same as the evidence that sent Mr. Wang to prison in the Zhang Guilan case twenty years ago. There is a corner missing on page 17 of the old file in the archives. Zhao Zhiguo remembered that his son had a high fever that day, and he put the note from the forensic doctor saying "the blood stains were at the wrong time" into the thickest stack of records. Now someone took a photo of this piece of paper and posted it in the comment area of ​​the "Jiangcheng Things" live broadcast. "Team Zhao, look at this." The apprentice handed over the phone. On the screen was the Weibo account of the missing person. The latest entry read: "Next, it's the turn of the person who stuffed the buttons into the trash basket." The barrage has gone crazy. Some people used "Police kill to silence", and some people revealed the school address of Zhao Zhiguo's son. The man in the blue shirt appeared again, this time holding up Old Man Wang's diary, and the camera focused on the page "Textile Factory Work Clothes". The rain was still falling, and someone drew a circle with red paint under the old locust tree in the demolition area. What's buried inside? Is it the real culprit in Zhang Guilan's case, or is it the secret that Zhao Zhiguo has hidden for twenty years?