Chapter 2139: Chapter 2134-important identity

Zhao Yu made a solemn vow, but reality slapped him in the face.

After five days, there was no progress in the investigation of the diary.

Zhao Yu was really confused. The answer was so close, but it never appeared. They had used all the technology they could use, but the mysterious murderer had never been revealed.

In the past five days, they had investigated most of the security guards in the teacher's College. According to the school's information, there were only two security guards who had guarded Zhi Zhen tower, and both of them had already passed away!

Even so, the police still went through a lot of trouble to find the family members of the two men and did a DNA test. The results proved that their DNA did not match the ones on the body bags at all, so they were ruled out of suspicion.