Eight years have passed.

In addition to the police officers who took over the case and the families of the victims who were waiting for the truth, many people can no longer remember what happened back then.

When Xiao Ran found Lei Kang, Team Lei had just returned from other district branches.

As the captain of the First Criminal Police Brigade and the person in charge of Thunder, Lei Kang's work can be said to be extremely busy. From the red silk in his eyes, it can be seen that even though Zhang Cailiang's case has been solved, he still did not sleep well tonight.

"sit."

Seeing Xiao Ran come in, Lei Kang pointed to the chair in front of the desk, picked up the cup with strong tea and took a few sips, "What's the matter?"

"Lei Brigade, do you still remember the 721 case eight years ago?"

Xiao Ran looked at Lei Kang because this case was investigated by Lei Kang, who was still the squadron leader at that time.

Lei Kang's hand holding the teacup froze to his mouth, and nodded with a serious expression: "How can you not remember such a profound case?"

"profound?"

"Yes, I have never encountered a criminal with such a clever anti-reconnaissance method. There was no trace of it except the body at the scene."

Lei Kang frowned and said, "At that time, the DNA database had just been established. The police in the city ran for this case. The technicians in charge of the comparison were eating and sleeping in the office that month, but they still couldn't find out what it was... That was the only case that had no results during my time as the squadron leader."

Xiao Ran nodded with a heavy expression and said, "A few days ago, Pang Jinghui and I went to a company on Snack Street to deal with a theft."

"Um?"

"I picked up a cigarette butt on the balcony of that company. At that time, I thought it was left by a thief, so I asked Yu Yu to help me introduce the DNA sequence."

Lei Kang jumped and looked at Xiao Ran firmly. He seemed to feel what Xiao Ran was going to say.

"I was idle today and compared it in the database."

Xiao Ran said calmly, "Then he successfully compared the suspect in the 721 case."

With a whisper, Lei Kang suddenly stood up from his seat. Although when Xiao Ran told him about the case, he felt that Xiao Ran had discovered some clues, although Xiao then came and thought about his thoughts getting closer.

However, when he suddenly heard Xiao Ran confirming the successful comparison, Lei Kang was still a little unbelievable. He lit a cigarette with excitement, took two sips to relieve his emotions, looked at Xiao Ran solemnly and said, "Are you sure!"

Xiao Ran stood up and nodded solemnly: "Confirm. The DNA on the cigarette butt is exactly the same as the DNA sequence left by the suspect 721!"

"Eight years, the eight-year old case will finally come to an end! Xiao Ran, I will thank you for the family of the victims of this case first!" Lei Kang took a deep breath, slowly raised his right hand and saluted Xiao Ran.

Xiao Ran didn't expect that this case had such a heavy weight in Lei Brigade's mind, and hurriedly said, "It was just a coincidence."

"Have you found out who left that cigarette butt?" Lei Kang asked.

"It's not sure, but according to the manager of that company, it was the cigarette smoked by the boss of their upstairs. When the cigarette butt was thrown down from the balcony, it fell on the balcony of their company."

Xiao Ran hesitated for a moment and said, "But the manager of the company said that the person who threw the cigarette butts should be surnamed Zheng... and he had worked in our system before, but later resigned."

"Has been a policeman?"

Lei Kang's brows furrowed. Although the owner of the cigarette butt was not really sure, if it was really done by this former policeman named Zheng, then it could solve why the suspect at that time had such high anti-reconnaissance capabilities.

People who know peers best!

"Don't tell anyone about this in advance."

After thinking for a while, Lei Kang made a decision in his heart. If the suspect had really been a policeman, then he would have many acquaintances in the police system. If he rashly launched an investigation, if the person heard some news, he would be alarmed and cause any adverse events.

"You are the most familiar with Zhang Lei. You two go to investigate the man named Zheng secretly and find opportunities to get his DNA. After all, you can't just be determined to be the perpetrator from a cigarette butt that you heard of."

Lei Kang said: "I am signing you a summons certificate, and you can pass it to the bureau for inquiries if necessary."

"clear."

Xiao Ran learned about Lei Kang's thoughts, went out to tell He Xiaoli, changed into casual clothes, took his little leg, Zhang Lei, and drove his own private car to the near snack street.

"What are you doing? You want to treat me to dinner. We haven't gotten off work yet..."

Looking at the various delicacies on the snack street, although he had just eaten, Zhang Lei still swallowed.

"If you want to eat, eat it, don't pay me."

Xiao Ran said casually that he was searching for nearby positions on 58.com. Along the way, he was thinking about how to find a reason to go to Zheng's company and come to the door for no reason. It was too abnormal.

"I'd better forget it. My old man has cut off my financial resources. Now my salary is enough to make me affordable and affordable..."

The more Zhang Lei said, the more miserable he became. He thought that he was the rich man in the dormitory at the time when he was in school. Of course, when Xiao Ran was low-key.

"Hey, what are you doing? You won't want to change jobs, right?" Zhang Lei said in amazement when he saw Xiao Ran checking nearby positions.

Xiao Ran glanced at Zhang Lei and said coldly: "Do you know how the villain died?"

"The villain died because he talked too much, who doesn't know..."

Zhang Lei was just thinking, so he opened his mouth and said, but he realized that he would be dead for a while.

"You're waiting here, I'll be back in a while."

Xiao Ran looked for a nearby position for a while, and he really found a recruitment announcement for a company on the 12th floor, but it was not Zheng's company.

But finally there is an excuse, right?

Xiao Ran carried a shoulder bag and went directly to the 12th floor. Unfortunately, the foreign trade company that posted the recruitment information was next to Zheng's company.

Disguising himself as a job seeker, Xiao Ran pushed open the glass door of the target company and saw that Zheng's company did not have many employees, and more than 30 people were busy all over the place, and no one paid attention to him coming in.

This was exactly what Xiao Ran wanted. He observed the company's position structure diagram on the wall on his right hand. The man in his thirties and square face and thin eyes at the top was the boss of the company: Zheng Yang.

He looked very kind.

"What are you doing, handsome guy?"

After standing for a while, someone finally noticed Xiao Ran. A young woman in a hip-clad professional attire came over and asked enthusiastically.

Xiao Ran showed his smile that could kill thousands of women in seconds and said softly: "Oh, I'm here for the interview, foreign trade staff, you have called me."

"Foreign trader?"

The woman was stunned for a moment, and then said with some disappointment: "You are in Wuchang's foreign trade interview, they are next to us... But you can also come to us to have a look. Our company is much better than them!"

After coming out of the building, Xiao Ran took the car and said, "Let's go to the public service hall."

"What are you going to do?" Zhang Lei was still confused.

Xiao Ran took out his cell phone and showed Zhang Lei the photo of Zheng Yang he took: "Go and check this person..."
Chapter completed!