After Jiang Hao learned in detail about what happened six years ago, he simulated the route that Yuan Lina might have walked after get off work.
That is, the short distance of more than 100 meters when she went to Nanfa parking lot to pick up the car after get off work, an accident happened.
So, what happened between this short distance of more than 100 meters?
"As a development zone, residents had almost moved. It was already desolate at 10 o'clock in the evening. There were basically no people on the road, let alone witnesses."
This distance is actually a distance from the scene of the crime, that is, the unfinished building project, which is about 400 meters.
Jiang Hao's brain was running at high speed, simulating that from this road, the suspect intercepted the victim and dragged her to the underground fan room of the unfinished building. The whole process was actually impossible to avoid one person.
That is: construction site guard.
Yes, there is actually a construction site viewer. He is responsible for guarding the construction site and usually needs to be on duty 24 hours a day to prevent the loss of construction site materials.
Therefore, during this period, it is generally difficult for the suspect to bring in a person or body without realizing it.
"Let's go back, let's find out who was here to see the construction site six years ago. So many migrant workers will start with him."
The first step of the Long March is always about starting. Jiang Hao decided to start with the guards at this construction site.
The three of them quickly took the bus back to the bureau.
"Xiao Jiang, are you back? Just in time, there is something you want to know. The forensic department has made the autopsy report and the victim's DNA test has been released. It is indeed the missing girl Yuan Lina. She was once used by someone else when she was killed.
He hit the head multiple times, causing death from skull and brain damage, and a little sperm spot was detected in her lower body. This is obviously a criminal case of sexual assault, so the suspect was initially judged as a male."
As soon as Jiang Hao and the others returned to the office, Miao Xiaofeng came back with the test report. As expected, there was another rape and murder case.
"Can the suspect's DNA be detected on the sperm spots?"
Sperm spots are sperm spots formed by evaporation and dryness of the water after male semen flows out. Under normal circumstances, sperm spots that have been left for 3-5 months can be effectively detected.
If preserved, it can be stored for several years and can still be tested effectively, and even sperm spots stored in laboratory conditions can still be detected after 25 years.
This is very important. Many rapists detect DNA based on sperm spots to identify the suspects, which is also the most favorable evidence in the trial.
"It's very difficult. After six years, and the basement environment is complex, it's very difficult to extract DNA data links from the sperm spots, and the integrity of the data link cannot be guaranteed. Colleagues in the technical department are also working hard. I hope
There are good results.”
Jiang Hao nodded. In front of objectively, everyone had to hope that the victim's spirit in heaven could bless the police to successfully extract the suspect's DNA from the sperm spots.
Then he seemed to think that Jiang Hao and the others had just gone to the development zone, so he asked, "By the way, how are you doing?"
"I copied the identity data of migrant workers on the construction site. I planned to check first from the personnel guarding the construction site, and then the local workers. The easy first and then the difficult, and check step by step."
"Well, just have a way of thinking. I'll be assured when you do things. Then you can be busy first and communicate with me in time. Just now, the victim's family members came to make trouble again, so I'll go to comfort me first." After that, Miao Xiaofeng went out.
So Xu Danying sent the data brought back from the development zone back to the computer.
"Xiao Jiang, let me tell you good news."
Jiang Hao poured a glass of water, walked over and asked, "What good news?"
"I just looked at it. At that time, the migrant workers were settled in two batches, and one of them was dismissed in mid-August, so the target of our investigation was reduced by half in an instant. Do you think this is a single one?
Good news?"
Xu Danying said to Jiang Hao with pride as if she was doing her best.
Jiang Hao took a sip of water and said, "Well, that's really good. It saves a lot of effort. How many people are left on the construction site?"
"Let me take a look, yes, I pulled the form, and there are about fifty people who need to be investigated." Xu Danying said seriously.
"There are still many people." When Jiang Hao heard that there were so many people, he suddenly had a headache.
"It's been much better, you know, if there is no screening, how many people are there?"
"How many?"
"More than 300 people!"
Jiang Hao was stunned, put down his cup, and said to Xu Danying: "Well, I thought about it, there are actually not many more than fifty people. In this way, we should start investigating from the people who are looking at the construction site. Please help me see it during that period.
,Who is guarding the construction site?"
"Okay, I'll take a look."
Fortunately, the data copied from the development zone is very detailed, and everyone's work, construction company, etc. are all available. After a little screening, Xu Danying found the name of the person guarding the construction site six years ago.
"I found it, look, Ge Mingliang, a person from Xieqiao, is 60 years old this year. He was on duty at the construction site. Later, after he received the severance payment, he stopped doing it. Let's go to his house to take a look first?
”
"Go now without further ado."
Ge Mingliang is not from another place, and it is very convenient to come and go, so let’s start with him.
"Don't go, Team Wang and I will visit. You sort out the details and arrange them according to the difficulty level. Only when we divide the labor and cooperate, we can achieve higher efficiency."
"But I want to go too." After finally coming to the Crime Team, Xu Danying certainly wanted to stay with Jiang Hao for a longer time.
"Well, I will sort out the tables too. Oh, I'm old and my legs are not good. I'm not suitable for running around often. It's better for you young people and you are full of energy. Xiao Jiang, just take Xiao Xu, I'll come here for the rest.
.”
Wang Weimin, who was standing by, also came from his youth, so why can’t he see some little Jiujiu? As an elder, he naturally wanted to match up, so he had secret injuries on his legs and feet, and wanted to rest and make them happy.
"Let's go." Jiang Hao said, and walked out with great strides.
"Wait for me, I'll get something."
Xu Danying quickly took the visiting registration book and pen and followed out happily.
In the car, Xu Danying deliberately pretended to be unhappy and said, "Hey, you have changed."
"Hey? Where did I change?" Jiang Hao didn't know why Xu Danying said that.
"You have changed. You don't want me to accompany you out for a visit."
"Damn, look at the sun so big outside, and I specially chose a job for you that doesn't bask in the sun. You are unhappy. Am I wronged?"