Moreover, after the police have conducted an in-depth investigation of the victims of the "shooting case", they are also likely to suspect that Zhou Xiaoping and Yan Jingyu are members of the "manganese mine robbery" case, and then realize that the essence of the "shooting case" is the infighting between the criminal gangs of the "manganese mine robbery case".

In short, Hu Zhisheng believes that the murderer's method of falsifying both the "shooting case" and the "Yu Haibo case" as "murder for money" has been reduced to complexity, which is suspicious.

Therefore, Hu Zhisheng believes that Zhou Xiaoping left a fingerprint on Yu Haibo's business card, and this clue should not be forged by the murderer, but should be done by Zhou Xiaoping before he died, and his purpose is not to tell the police that the murderer is Yu Haibo, but to imply that the police can track the murderer through Yu Haibo.

When Zhou Xiaoping was dying, he didn't have the spare time and strength to leave more detailed clues, and when he saw the wallet next to him, he thought that there was a business card of Yu Haibo in it, of course, he could only do his best to leave fingerprints on this business card as a hint.

Since Zhou Xiaoping thought that the murderer could be tracked through Yu Haibo, the murderer must have also thought of this, so after he cut off the connection between himself and Zhou Xiaoping and Yan Jingyu, he immediately cut off the last link of the association with Haibo.

Whether it is Zhou Xiaoping's hint or the result of the murderer's killing of Haibo, it shows one thing: there is a certain connection between Yu Haibo and the "Manganese Mine Robbery", and through Yu Haibo, the main culprit of the robbery can be traced, that is, the murderers of the "Shooting Case" and the "Yu Haibo Case".

At the same time, Hu Zhisheng pointed out that only under the assumption that the clues pointing to Haibo at the scene of the "shooting" were left by Zhou Xiaoping, all the above-mentioned doubts can be easily solved.

In the eyes of the murderer, the police could only track him down through Zhou Xiaoping, Yan Jingyu and Yu Haibo, so he created the "shooting case" and the "Yu Haibo case" respectively, and faked these two murders as "murder for money".

Because in the eyes of the murderers, there is nothing to do with these two cases, and the police will only investigate the two murders separately when they do not know that Yu Haibo is also related to the "manganese mine robbery". In this case, there is nothing wrong with the murderer's falsification of the two murder scenes.

But what the murderer didn't know was that Zhou Xiaoping left the clue of Yu Haibo before he died, so that there was a connection between the two murders, which not only completely disrupted the murderer's wishful thinking, but also made the murderer's method of falsifying the two murders as "murder for money" seemed quite rough.

Hu Zhisheng's analysis is interlocking and logically rigorous, and even makes many people think that this is likely to be the truth of this series of cases, so it has been approved by everyone.

But then a new question arises: Is the criminal gang of the "manganese mine robbery" five or six? Judging from Hao Yi's confession and the means of transportation they used before and after the crime, the gang members should be 5 people, but if this is the case, what happened to Yu Haibo who suddenly appeared?

What is certain is that Yu Haibo is at least related to the murderer, Zhou Xiaoping and the "manganese mine robbery", in addition, it is uncertain whether Yu Haibo participated in the "manganese mine robbery", whether he was directly involved or indirect. Because Hao Yi, as the only witness who is still alive, can only confirm that Hao Ren participated in the crime at the scene, and as for the others, Hao Yi cannot confirm it at all.

Since the discussion can't come up with a reason, let's continue the investigation, and the direction of the investigation is also very simple and clear: around Yu Haibo's social network.

Soon, the police had a harvest: Yu Haibo and a person named Yin Jiancheng were cousins, and the two had a very good relationship.

As soon as he saw the name Yin Jiancheng, Hu Zhisheng's eyelids jumped, and he quickly thought of Yin Fusheng, who followed the police all day long and asked the police about the case when the police were initially investigating the robbery.

Going around in a big circle and back to square one? Could it be that this Yin Jiancheng is the main culprit in the "manganese mine robbery"?

It was further confirmed that this Yin Jiancheng was indeed the son of Yin Fusheng, a villager where the manganese mine was located.

Hu Zhisheng immediately asked the Supreme Public Security Department to compare the dNA left by Yin Fusheng with the murderers at the scene of the "shooting case" and "Yu Haibo case". If Yin Jiancheng is the main culprit of the robbery and the creator of these two murders, Yin Fusheng's dNA should undoubtedly match the murderer's dNA.

At the beginning of the investigation of the "manganese mine robbery" case, Hu Zhisheng suspected that the robber who died at the scene of the crime might be Yin Jiancheng, so he obtained Yin Fusheng's dNA test sample at that time. Now, Yin Fusheng's dNA data left in the top public security department is about to come into play again.

At the same time, Hu Zhisheng ordered the police to interrogate Yin Fusheng quietly and without much fanfare. The successive deaths of Zhou Xiaoping, Yan Jingyu and Yu Xiaobo alerted Hu Zhisheng, who knew that he had encountered a very cunning opponent who could be alerted at the slightest disturbance and take decisive countermeasures.

Yin Jiancheng's whereabouts have not been determined before this, and the police's investigation of Yin Jiancheng is mainly based on interrogating Yin Fusheng for the time being.

The police asked the local village party secretary for help and asked him to inquire about Yin Jiancheng's whereabouts from Yin Fusheng in the form of door-to-door visits. According to the time, Yin Jiancheng has been "going out to work" for almost four months now, and if he has not contacted his family, then his suspicion will only be greater.

Soon, the village party secretary fed back a "good news" to the police: a few days ago, Yin Jiancheng called the brigade headquarters and left a contact number for Yin Fusheng. This phone number is the big brother mobile phone number of the boss of the construction site where Yin Jiancheng works.

After Yin Fusheng got the information from the brigade headquarters, he dialed this phone number, and after learning on the phone that Yin Jiancheng had traveled to many places and changed several jobs in a coastal province, he finally decided to stay at a construction site in a certain city for a long time.

The reason is very simple: the owner of this construction site is a native of Yancheng, and he has been generous enough to let his fellow workers use his big brother to contact his family for free.

After Hu Zhisheng received the "good news" from the village party secretary, he immediately couldn't cry or laugh: If the news is true, it means that Yin Jiancheng has been in the field for the past few months, and there is no time to commit the crime at all.

On the grounds that there were other young people in the village who wanted to go out to work, the village party secretary asked Yin Fusheng for the phone number left by Yin Jiancheng, and said that he wanted to ask Yin Jiancheng in person if the boss of Yancheng still wanted to recruit workers.

According to the phone number provided by the village party secretary, the police confirmed that the place of ownership of the number was indeed the city where Yin Jiancheng was working, and after dialing the number, the police learned in detail about the personal situation of the user of the number, and after inquiry, it was also found that this person was indeed from Yancheng.

The construction site owner from Yancheng confirmed to the police that there was indeed a Yancheng villager named Yin Jiancheng under his command, and that he should be working on the construction site now, and he asked Jiancheng to call back a little later.

After hanging up the phone, Hu Zhisheng was even more melancholy: the connection between Yin Jiancheng and Yu Haibo is likely to be just a coincidence.

This was also confirmed by the results immediately fed back by the Supreme Public Security Department: Yin Fusheng and the dNA who was suspected of being the murderer at the scene of the two murders did not match at all, and there was no blood relationship between the two.

After that, Yin Jiancheng really took the initiative to call back. Hu Zhisheng asked the police officer handling the case to do routine business, asked the other party some information about Yu Haibo on the phone, and then completely removed Yin Jiancheng from the list of suspects.

The information provided by Yin Jiancheng is within the scope of the police's knowledge, so it has no practical effect.

Next, the police screened two suspects from Yu Haibo's social networks, but they were soon ruled out of suspicion.

Just when the case was at an impasse, in the face of various clues collected by the police from Yu Haibo's home, Hu Zhisheng made a new discovery: among Yu Haibo's personal belongings, there were 11 business cards, all of which were the owners or managers of gold and jewelry stores in Yancheng, which should be related to the pawnshop he himself worked in. He pledged gold and jewellery from the customer at a low price, and if the customer failed to redeem the pledged items within the time limit, he resold the valuables to the gold jewellery shop at a slightly higher price.

In a pile of such business cards, there is also a business card of a real estate agency, and the handwriting on it indicates that the agency is mainly engaged in the business of renting and renting houses.

It is not difficult to see from these business cards that Yu Haibo will leave his business cards if he needs them, but what is he doing with this business card of a real estate agent?

There are no other vacant houses or storefronts to rent under Yu Haibo's name, which means that he probably wants to rent a house.

Hu Zhisheng immediately sniffed out a hint of abnormality: Yu Haibo inherited his parents' house and façade, why did he want to rent another house?

Soon, Hu Zhisheng had a new conjecture: Yu Haibo found an intermediary company to rent a house, most likely to meet with the criminal gang of the "manganese mine robbery".

Hao Yi claimed that "Brother Cao" had always been in contact with his brother Hao Ren, and Hao Ren would often go out for most of the day before coming back, probably discussing the details of the crime with "Brother Cao" and others.

That is to say, whether the criminal gang is planning the details of the crime, or meeting to discuss and divide tasks, they need a relatively private place, such a place in anyone's home will make that person feel unsafe, and renting a suite is naturally the most suitable.

But in whose name is it renting such a house? It is naturally more appropriate to rent this apartment in the name of a person who has nothing to do with the "Manganese Mine Robbery", and this is likely to be the connection between Yu Haibo and the "Manganese Mine Robbery".

Hu Zhisheng immediately found this real estate agency according to the location on the business card, and after some inquiry, he found that Yu Haibo had rented a suite, and the lease period had not expired.