After waiting for nearly twenty minutes, Wang Binbin drove a Santana over.
"Du Suo, Factory Director Yang said you can use the car as you please. He is not in a hurry to use it. If he is really in a hurry, he will drive his own van."
Du Dayong was not familiar with this place, so he could only borrow a civilian Santana from a factory director like Director Yang. However, after the operation was over, Du Dayong would still find a way to compensate him.
After Wang Binbin left, Tu Qijun got in the car and checked it. He found that the equipment was complete and the fuel tank was still full, so he drove towards Zhongcheng District.
Du Dayong thanked Tie Tujun again and again before driving to the place by himself.
After returning to the institute, Du Dayong went to the cafeteria to eat, because soon Deputy Director Sang would pass on the files and materials on the murder case of Liu Siji's wife to him.
After eating and returning to the office, Du Dayong turned on his computer and found that the document had been received in his mailbox.
When I opened it, I saw that it was the material about the murder of Liu Siji's wife.
Liu Siji's wife is Pan Guanghui, a middle school teacher. On the night of the incident, Pan Guanghui was giving compulsory tutoring lessons to the graduating class of junior high school students, and the tutoring lasted until nine o'clock in the evening.
That night, Liu Siji went to attend a family dinner for students applying for a physical education major.
Because Liu Siji drank too much that night, he was unable to pick up his wife Pan Guanghui on time. Pan Guanghui left school at 9:32 pm.
Logically speaking, if Pan Guanghui went back through the main road, nothing would happen.
However, Pan Guanghui happened to go back through that alley that night. Judging from the file, the investigators conducted an investigation experiment. It took about nine to twelve minutes to walk from Pan Guanghui's school to the crime scene.
It takes about eight to eleven minutes to walk down, so the total journey time is about seventeen to twenty-three minutes.
However, according to the investigators' investigation experiments, it only takes about fifteen to twenty-one minutes to go home from Pan Guanghui's school via the main road.
So why did Pan Guanghui choose this road, which is remote at night and has a long way to go back? Because the case has not been solved and there is no way to know.
According to the file, because no one came to pick up Pan Guanghui that night, the guard in the school security room went out of the school door to take a look. There was a four-way intersection not far from the school gate to the west, but there was no way at this four-way intersection.
One hundred meters away is Changle Street, also known as Changle Lane. The guard watched Pan Guanghui enter the alley with his own eyes.
At the same distance, many people will think that the alley is closer than the main road and the road is farther. This is because there are more reference objects in the alley and less on the road. The alley is narrower and the road is wider.
But what did Pan Guanghui think? There are street lights on the main road, but there are no in the alley. Although this alley is very lively during the day, it does not mean that the alley is also very lively at night.
Du Dayong felt very strange as he watched. Pan Guanghui's behavior made Du Dayong feel a little weird.
As he continued reading, Du Dayong felt that it was even more outrageous.
Pan Guanghui's belongings were not left untouched, including watches, gold rings, gold necklaces, and the wallet in her backpack, which contained whole and small bills.
Not only that, when the murderer killed Pan Guanghui, it was almost a fatal blow, because the second knife was identified by forensic medicine as being in the same wound, which was not as deep as the first knife, and it was the first knife that caused Pan Guanghui's death from hemorrhagic shock. And this first knife
When the knife penetrated Pan Guanghui's body, it was also aimed at the abdominal aorta in Pan Guanghui's abdomen.
But the investigators at that time basically checked all the clinicians in Zaozhuang, even those who had not graduated.
However, nothing was found. No such person had a motive or time to commit the crime.
The investigators also investigated the social relationship between Liu Siji and Pan Guanghui in detail.
It turned out that the couple had a very good reputation, were kind to others, and never had any grudges with others. Even the parents of the child with the worst academic performance in Pan Guanghui's class were grateful to Pan Guanghui.
Liu Siji is similar. A runner who has passed his prime, he treats his students very well in the sports school.
When Du Dayong saw random killings mentioned in the file, he immediately dismissed this possibility.
Because random killings have certain characteristics, not only did the crime scene leave no trace of others staying for a long time, but the murderer stabbed Pan Guanghui head-on with a knife, and the speed of the knife was very fast. According to the identification of the forensic doctor, almost half of the knife was struck before and after the two stabbings.
There was not much time difference. Then the murderer drew his knife and retreated away. Pan Guanghui fell backwards, and the blood spatter only left a short distance in front of Pan Guanghui.
Because all the blood stains and blood drops at the scene had been completely destroyed by those who discovered it later, it was impossible to collect effective footprints or other physical evidence.
Even under such conditions, the forensic doctor diligently examined the footprints on the blood stains, but only found the footprints of the person who reported the case where Pan Guanghui's body was found.
Only then did the forensic doctor conclude that the murderer stabbed continuously and immediately drew the knife away.
When Du Dayong saw this, he knew that the murderer's killing methods were very clean and neat, and his psychological quality was particularly good.