Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Wang Zhaokai has checked carefully and found that there are only 6 cameras in the entire yard.

Walk left from Wang Qin's apartment building to the gate of the community. You will pass three cameras in the middle, but if you walk right, you will see an iron fence next to the road.

Wang Zhaokai walked around the fence and found many signs of climbing.

It is obvious that some people in the community climbed over the fence directly instead of going through the main gate for convenience.

Therefore, if Wang Qin's son is really the murderer, then there is a high possibility that he climbed out from here and left the community.

This is also why the police did not find any abnormalities when checking the surveillance footage after the incident.

"Captain Wang, the test results are out!"

In fact, at around nine o'clock in the morning, the technical department had finally completed the testing of some samples sent back yesterday.

"Some of the leather residue inside the shoes has been DNA tested and it completely matches the DNA of the deceased's son, Li Chunfeng!"

Yesterday afternoon, Wang Zhaokai arranged for someone to collect blood from Li Chunfeng, Wang Qin's son.

Sure enough, some DNA residues in the shoes were successfully matched with Li Chunfeng's DNA information. In other words, it has been confirmed from the evidence level that the pair of shoes stained with blood are indeed Li Chunfeng's.

"Does the blood residue on the shoes match the blood of the deceased?"

The criminal police who delivered the appraisal report nodded affirmatively.

"It matches. Although they cleaned the shoes to some extent, the dried blood was not completely cleaned. The shoes are black and have some blood stains that have been extracted by us. They are consistent with the blood of the deceased."

"We also conducted low-salt information testing on some substances in the bathroom and sink that the relevant criminal police had collected. Some of the substances in them matched the blood of the deceased. The results of the DNA test can prove that the murderer did clean the room after killing the person."

Wang Zhaokai nodded. He was not surprised by the discovery of the technical department, because after collecting the relevant government affairs yesterday, Wang Zhaokai had this inference. The reason why the technical department was required to do identification and analysis was to finalize the case at the evidence level.

The investigation and handling of criminal cases requires logical coherence and a complete chain of evidence.

Of course, in real life, the outbreak of many cases is illogical, but the illogicality of reality does not mean that the process of solving the case is illogical.

When the court makes a verdict, the most important thing is that the chain of evidence is complete. This complete chain of evidence cannot be proved by just a fingerprint or a footprint.

In the past, when sentencing many cases, a person was declared the murderer just because of his fingerprints or footprints found at the scene. The police would not believe anything the other party said, which led to many cases of false convictions and wrongful convictions.

Because if the murderer could leave footprints or fingerprints at the scene, he would definitely leave other traces, but the police did not discover these traces at the first time.

Now the entire chain of evidence is basically complete.

First, there was surveillance video of Li Chunfeng arriving at the community, and there were also neighbors who claimed to have seen Li Chunfeng.

However, no neighbor saw Li Chunfeng leave, and no surveillance camera captured Li Chunfeng leaving.

When the police inquired about the relevant circumstances on the day of the incident, both Wang Qin and Li Chunfeng refused to mention the fact that Li Chunfeng had returned home that morning.

So why did they hide this? Wang Zhaokai remembered clearly that when he first met Li Chunfeng, he came back crying.

The other party said that he was planning to come back that day to celebrate with his parents, and that he had been admitted and had a job at the Water Industry Group.

I was out shopping and this happened before I came back.

"Where's the wine glass? Are there any biological traces of Li Chunfeng on it?"

According to the judgment of Wang Zhaokai and others, if Li Chunfeng was the murderer, then after killing his father, he agreed with his mother to let his mother take the blame.

In order to fake the scene, Wang Qin changed Li Chunfeng's shoes and washed them. She also made the bloodstains in the room messy and disappeared. She left no traces of Li Chunfeng's presence here and even washed the dishes he had used in the kitchen.

However, perhaps because the incident occurred too quickly and time was tight, Wang Qin was unable to deal with many details, such as the broken wine glass on the ground.

The staff nodded.

"We have also extracted the biological information on it, which matches Li Chunfeng's DNA information. There is his saliva on it."

"Not only that, we also extracted Li Chunfeng's saliva from one of the two ribs we brought back, which means that he was not at home that day as he said. In fact, he had that meal there with his parents."

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This time the police investigation was very detailed and the work done was sufficient.

While the technical team was making their report, the on-site survey also came to some conclusions and came to Wang Zhaokai's office to report.

"Captain Wang, our test results are out."

During the second on-site investigation, the two on-site investigation detectives stayed at the scene for almost a day, combing the entire scene from beginning to end, except for some government affairs related to fingerprints handed over to the technical department. The mobile phone was re-identified.

"Last night we focused on identifying the fingerprints on the kitchen knife in the chest, especially the one that was wiped."

In fact, the fingerprints on the kitchen knife had already been collected by the criminal police and compared with Wang Qin's fingerprints, and the comparison was successful.

At that time, we thought the case was relatively simple, so we only compared the surface fingerprints. However, during the on-site investigation this time, we found that there were some wiped fingerprints under Wang Qin's fingerprints. It was thought that the fingerprints were blurred due to the friction of Wang Qin.

But in fact, the detective did not open the trash can in the living room and found a ball of toilet paper with blood on it next to the coffee table. This was most likely the toilet paper that Wang Qin used to wipe the handle of the kitchen knife.

"After we extracted this position, it was difficult to successfully identify it, so we called Director Lu, and Director Lu sent us the identification results this morning."

Wang Zhaokai didn't expect that it was Lu Chuan who did the appraisal directly.

"Is Director Lu here with us? Or is he at the branch office?"

"When we called the police station yesterday, the police station was relatively close to home, so the department went directly to the police station. The report has been sent over. The fingerprint was not from Wang Qin, but from Li Chunfeng.

Although there is only one, combined with other evidence, it is enough to determine that Li Chunfeng is a novice. "(End of this chapter)