The car soon stopped at a dark alley, and Gao Jinbao shone the way for everyone with a flashlight.

Through the dark and dilapidated alley, we arrived at a row of residential areas, which were full of defeat.

Crowded row houses crisscrossed, and most residents set up their kitchens in front of the outdoor porch.

To the residents here, they were like an outside intruder, incompatible with this environment, and received various curious or numb visions from all directions as soon as they stepped into the residential area.

The door number here is not easy to identify, so Xiao Zhuo had to walk in front and count it carefully. After a long time, he finally stopped in front of an iron door with rusted paint.

Xiao Zhuo turned on the light and looked at the door lock. It was a very ordinary padlock. The surrounding environment was not good, and there was a layer of dust on it. It was obvious that Lao Zhang had not come back in the past few days.

Everyone was scattering around to find something useful. Su Li also walked to the windowsill with a flashlight and went to the house to observe. There was a layer of dirt on the windowsill glass blocking the view, making it difficult to see what was going on in the room.

"Who are you? What are you doing in front of Lao Zhang's house?" An old lady from the neighbor walked out of the room and looked at the people and asked loudly.

Su Li turned to look at her: "Grandma, we are police."

"Police?" The old lady pulled the corner of her mouth: "What did Lao Zhang do again? He has called the police."

When Su Li heard this, her eyebrows moved slightly, and walked up to her and asked, "Grandma, have you seen Lao Zhang these days?"

The old lady looked unconcealed and disgusted: "No, his rent has been delayed for almost a month. If I don't come back, I will find someone to throw all his things out. Who are there every day!"

"Don't he have a job? Why do he still owe you rent?"

"That little salary is enough for him? I'll go gamble with a little money! No..."

The old lady pointed to a red brick with knife marks on the wall at Lao Zhang's door: "My wall was cut down by the person who came to collect debts before, and asked him to repair it, but it has not been repaired yet!"

Su Li looked at Xiao Zhuo, and Xiao Zhuo asked, "Do you know where he usually gambles?"

The old lady shook her head: "How can I know this? If you find him, let him rent the house to me quickly."

Xiao Zhuo thought for a few seconds and asked again: "Grandma, do you have the key to this house?"

"Where do I have it? Don't give it to him?" After saying that, he turned around and entered his own room.

Su Li heard that Xiao Zhuo wanted to enter the house to check it out, and asked, "Have you not issued a search warrant yet?"

Fang Shunliang took out a search warrant from the bag under his arm, took out a brush and wrote for a while, and said proudly: "Isn't this happening?"

"But there is no key? Are you going to break the door?" Gao Jinbao asked.

Su Li glanced around in front of the room for a few circles, and slid one by one over the bricks on the windowsill and the roof under the porch, and finally stopped on an abandoned small water tank in front of the room.

She walked to the water tank, held the flashlight in her hand and looked carefully for a while, then squatted down and groped for a moment.

"Finally found!"

Xiao Zhuo was surprised for a moment and sighed at her agility, and praised: "It's done well."

After being surprised by the others in the second team, they were more of this mentality. Su Li's highlights became more and more common to them.

Xiao Zhuo took the key and opened the door. A smell of stench like a garbage dump came over. Although the people standing in front of the door held their breath in time, they were still disgusted by the smell.

Fang Shunliang took advantage of the light of Xiao Zhuo's flashlight and frowned deeply.

He covered his mouth and nose and said, "This person is too dirty! Can he still be a chef?"

Gao Jinbao also echoed: "Yes! This is not what the hotel owner said, right? This should be very lazy!"

From the perspective of everyone, Lao Zhang's house is comparable to a small garbage dump, with all kinds of domestic waste scattered inside, furniture with heavy oil and dirt, black patina bedding, and tableware that had not been packed up on the table and still had food residue.

There was basically no place to get off the feet in the room, and the face was dirty. The flies felt the light and were flying everywhere at this time.

Su Li didn't say anything, followed Xiao Zhuo and stepped into the room first. She took out a pair of gloves from her bag and put them on, and then began to look through the items in the room.

Seeing this, Fang Shunliang and others stopped complaining and followed them to investigate the room.

After carefully searching for about half an hour, I found the IOU signed by Lao Zhang and several casinos, as well as a newspaper with news about bank robbery some time ago.

The second team members returned to the car and started discussing.

Fang Shunliang: "I think the person who committed the crime with Xu Dong was Lao Zhang, who did not run away. He owed money from the casino and saw the news of the robbery, so he had the idea of ​​robbery."

Xiao Zhuo nodded: "This may be his motivation."

Su Li: "But if robbing money is the motive, why not take away the remaining 1,100 yuan in cash?"

Gao Jinbao: "If Lao Zhang was for money, then what was Xu Dong for? It's because Xu Xingwang no longer taught him carpentry work?"

Xiao Zhuo: "Actually, there is a more important question. All the things we are currently looking for are based on Su Li's profile and there is no actual evidence, so even if the two of them are found, it is difficult to make them plead guilty."

"And if they had already run away by car, four days would be enough for them to run around the world."

The case seems to have a goal, but it still leaves everyone at a loss.

In a dull state, Su Li whispered: "It seems that we still need to ask Director Li for help!"

The next morning, as soon as Director Li appeared, Su Li and Xiao Zhuo followed.

"What?" Director Li took off his coat and hung it on the coat rack, tidied up the cuffs of his shirt: "You two have something to do with me?"

Su Li's eyes signaled to Xiao Zhuo and said, Xiao Zhuo: "Director Li, is there any DNA test in the province?"

Director Li frowned: "What dna?"

"It's the deoxygenated nuclear...nuclear...nuclear...it's better for you!" Xiao Zhuo really didn't know the name and gave up asking Su Li to explain.

"DNA, also known as DNA, can be isolated from human blood, skin, saliva, hair or other tissues. Everyone's DNA is basically unique and can be used to identify suspects."

At this stage, since they already have the blood sample of the suspect, they can take Xu Laosi's blood sample and identify him. If they can identify the relationship between the two father and son, they can confirm that the murderer is indeed Xu Dong.

In this way, they can also apply to the police station to ask other local police stations to investigate whether there are any traces of Xu Dong and Lao Zhang.

Xiao Zhuo and Director Li added to the current dilemma facing the case and their ideas.

After hearing this, Director Li roughly understood what they meant and smiled: "I just told you yesterday that I needed help to come to me, but I didn't expect to come to me today. Okay, I'll call me and ask if there is any such item in the province.

Technology, but I haven't heard of it."

Director Li was very satisfied with their way of helping him. He didn't just throw the problem out, but asked for help with solutions.

"Actually, it's the first time I've heard this technology. I was surprised after hearing Su Li's talk about it yesterday. After consulting with friends in Beijing, I found out that this technology is really available now, and I have been using it in Beijing for two or three years.

.”

Director Li listened to Xiao Zhuo's words and sighed: "So I said the police station still needs fresh blood like Su Li."

...

After hanging up the phone, Director Li raised his eyes and saw Xiao Zhuo and Su Li staring at him with big eyes looking forward to him, and said with a smile: "It's done, let you catch up. The province just got it two months ago.

Introduce!”

Xiao Zhuo was relieved when he heard this. After saying goodbye to Director Li, he took Su Li and the technicians to Xu Laosi's house. The rest of the team were arranged by Xiao Zhuo to find Lao Zhang to find the place where Lao Zhang was gambling early in the morning.

When he arrived at Xu Laosi's family, his family had not yet gone out. When he saw the police officer who came to find them, Xu Laosi swallowed nervously: "Police Officer, what are you doing?"

Xiao Zhuo asked the technicians to prepare the blood-drawing equipment first, and then spoke to Xu Laosi: "You need to cooperate with the blood sample to take for a test."

The tone was not gentle and I could not hear any emotion. After saying that, the technician walked forward.

When Xu Laosi saw the technician getting closer and closer, he looked panicked: "Why do you still have to smoke my blood?"

Xiao Zhuo's eyes signaled that the two police officers had slightly restricted Xu Laosi's actions and said, "We suspect that the death of Xu Xingwang's family is related to Xu Dong, and the suspect's blood sample has been extracted. Now that Xu Dong can't be found, just

Please help with the test.”

After hearing this, Xu Laosi was frozen in place and had not reacted after the technicians took the blood sample.

"Bang!" The sound of heavy objects falling to the ground came from the gate of the courtyard. Everyone looked back and saw a young woman standing blankly at the door. Behind her was a child over one year old, and her face was turned off.

Basin of water and scattered wet clothes.

The woman was unbelievable, and her voice became a little bit shining with fear: "What? Dad, what are they talking about? Is Dongzi killing Uncle Xu's family?"

Xu Laosi did not answer, but just stood there in disgrace.

"Dad, you talk! Did Dongzi really do it? Didn't he work in the county?"

"Jie! What's the name? They are farting, why would Dongzi do this? Look forward to the child going into the house."

Xu Laosi's wife came back from the shock and said fiercely to her after hearing her daughter-in-law's words.

The young woman was trembling fiercely by her mother-in-law. Although she still wanted to ask, she seemed to be afraid that her mother-in-law could only squat down and pick up her clothes and go into the house.

"Wait a moment!"

Su Li looked at her for a while and suddenly made a sound. Everyone in the yard looked at her with some clues.

"Is this Xu Dong's child?" she asked.

The young woman trembled and took two steps back, looking at Su Li with caution.

Su Li approached Xiao Zhuo and whispered: "Please another sample of Xu Dong's child!"

The current DNA technology is not yet perfect, and one more sample will give you more insurance.

Su Li briefly told him about his thoughts, and Xiao Zhuo thought for a moment and explained it to the technician.

Because Xiao Zhuo and his friends were relatively quiet when they communicated, the Xu family didn't know what they said, so when Xu Laosi's wife saw the technicians who were walking towards her daughter-in-law and grandson, she immediately started to tantrum.

She rushed forward to stop the technician and almost pushed him: "What are you doing? What are you going to do? Don't touch my grandson."

The child was so scared that he cried out loud by his grandmother's scream. Xu Dong's wife had to move him from behind to her arms to comfort her.

Seeing that she was excited, Su Li asked her to calm down first and said to Xu Dong's wife: "We only need to collect blood from the finger of the child's left ring finger, so that it will not cause harm to the child."

Seeing that the police were very determined, Xu Dong's wife finally agreed.

Su Li nodded, and the technician waited for Xu Dong's wife to coax the child before stepping forward and quickly collected blood samples.
Chapter completed!