Since it's not a financial killing, will it be a vendetta killing? And Lao Lin's family, with whom did they form this kind of hatred that they would stop if they wanted to kill people?

First of all, Lin Yu is just a seven-year-old child, and the possibility of enmity with others is almost zero; Grandma is a standard rural woman, who usually does her duty, and even quarrels with others almost never happen.

Through his understanding of the villagers, Zhang Tao quickly focused his investigation on Lao Lin. Lao Lin was irritable and stubborn, and when he was young, he worked in other places until he retired, and then returned to live in the village.

Also, the bloodstains at the scene were wiped and covered up by the murderer, and even the doors and windows were deliberately locked before leaving, creating the illusion that the three grandchildren were going out. This also shows that this murderer is thoughtful and has a certain anti-investigation ability.

At the same time, after analysis, it is highly likely that the murderer should be an acquaintance who committed the crime. Because, if it was a stranger who committed the crime, he must have hurried away from the scene of the crime after committing the crime, and he did not need to go to such great lengths to dispose of the corpse, and he did not dare to stay at Lao Lin's house for a long time to deal with the traces of the crime. And more importantly, why did the murderer put so much effort into dealing with the scene? Also, while killing two old people, even a seven-year-old child was not spared? There is only one possibility, that is, Lin Yu himself knows the murderer, and the murderer is afraid that Lin Yu will reveal his identity.

Zhang Tao dispatched manpower to conduct a large-scale visit and investigation in the village and the village, focusing on those who had conflicts with Lao Lin. The results of the investigation showed that Lao Lin and most of the people in the village had conflicts, and the most acute was Lin Wei, a relative of Lao Lin.

The police learned that the conflict between the two had intensified repeatedly, mainly because many years ago, they had fought for an osmanthus tree on their ancestral grave.

This osmanthus tree was originally planted by Lin Wei, but Lao Lin thought that since it grew on the ancestral grave, it belonged to everyone. In recent years, the price of osmanthus trees has risen repeatedly, and Lao Lin dug up this osmanthus tree without notifying Lin Wei, and sold it on the market. Lin Wei didn't agree this time, and the two have been married since then, and even when Lin Wei celebrated his sixtieth birthday, Lao Lin did not participate.

Moreover, the village also reflected that Lin Wei had cursed the old Lin family, and the family had to die well. And Lao Lin has told his acquaintances in the village more than once that if something happens to him one day, it must be Lin Wei's doing!

So, Zhang Tao found someone to find Lin Wei, Lin Wei is a peasant man with five big and three thick, although he is over sixty years old, but at first glance, he is a person who is usually easy to cause trouble.

"Do you know that your relative Lin Yu's family of three is missing?" Zhang Tao didn't dare to be sloppy at all this time, and personally interrogated him.

"Yes." Lin Wei didn't act flustered.

"How did you know the news of Lao Lin's disappearance?"

"My wife told me." Lin Wei replied fluently, without thinking about it at all, and at first glance, he was prepared.

"And how did your wife know?" Zhang Tao's question made Lin Wei a little unnatural, obviously he didn't expect Zhang Tao to ask this question.

"In the village, Mrs. Lin, who lives next to Lao Lin's house, told her." After being stunned for a moment, Lin Wei answered.

After all, Zhang Tao is a person with many years of experience in handling cases, and this change in Lin Wei's answer to the question did not escape his eyes.

Zhang Tao called his criminal police and asked them to go to Mrs. Lin as Lin Wei said to understand the specific situation. The results of the criminal police's investigation confirmed Zhang Tao's thoughts - according to Lin Wei, it was Mrs. Lin who called her wife, saying that the old Lin family was missing, and her wife told him after she knew about it. And according to the situation reported by the criminal police who went to understand the situation, it was completely different from Lin Wei's statement!

The criminal police found Mrs. Lin to understand the situation, but Mrs. Lin actually said that she didn't know Lin Wei's wife's phone number at all, and it was even more impossible to call her to say anything about the old Lin family's disappearance. For the sake of safety, the criminal police also questioned Mrs. Lin's husband, and also confirmed that he had never told Lin Wei about the disappearance of the old Lin family.

Why did Lin Wei lie? Explain that he has a problem! As soon as he made a move, he gained something, which made Zhang Tao excited all of a sudden.

"Lin Wei, where were you on the day of the crime?" Lin Wei was interrogated again, and Zhang Tao had already determined that Lin Wei was lying and wanted to hide something.

"On the twenty-eighth? I watched the two dogs play cards at the head of the village. "Lin Wei actually remembers the number of the day of the crime so clearly? Obviously, he had figured out how to answer.

Zhang Tao looked at this old man with gray hair, he actually didn't want to believe that he would brutally kill all three members of Lao Lin's family for a little grudge. However, this person's answer is too suspicious.

So, he once again sent the criminal police to find Ergouzi and asked No. 28 if Lin Wei was watching them play cards in the village. The two dogs thought for a while and said that they didn't play cards at the entrance of the village on the 28th. He remembered very well that the specific time of playing cards was on the 27th, and Lin Wei was indeed present to watch them play cards that day, and he quarreled with him because of his interference.

At the same time, Zhang Tao found traces of being scratched by branches on Lin Wei's hands. There are thorns outside the cave, and the murderer wants to hide the body in the cave, and it is inevitable to be scratched by thorns.

This Lin Wei lied again and again, and the suspicion was getting bigger and bigger, so Zhang Tao had to list him as the first suspect. However, it is a pity that at the scene of the crime, no evidence was found that could directly point to the suspect, Lin Wei.

So, Zhang Tao once again found a forensic doctor to further examine the bodies of his grandson and grandson, hoping to find some clues from them. However, once again, it is a pity that the forensic doctor still did not extract any incriminating evidence that could connect with the suspect Lin Wei on the bodies of the three grandchildren.

Although Lin Wei was taken into custody as the biggest suspect, there was no direct evidence to prove his crime of killing people and throwing corpses.

At the same time as Zhang Tao's criminal police team investigated, Lin Jinghao and his entourage also launched an investigation. The direction they detected was the same as that of Zhang Tao's criminal police team, because he was also definitely familiar with the possibility of committing crimes.

However, after the investigation of the police, there were more than 20 people who had prominent conflicts with Lao Lin except Lin Wei. Moreover, the contradiction between these people and Lao Lin seems to be sharp, but they want to kill people with this. Even, if you want to kill Lao Lin's family, it seems a little unreasonable. What's more, after some inquiry, these 20 or so respondents were able to provide proof that they did not have the time and place to commit the crime.

Could it be that the idea of the investigation is wrong! After learning that Zhang Tao's criminal police team did not have any definite evidence, Lin Jinghao summoned Pei Feng and the others together again.

"Do you think there is any problem with our thinking?" Lin Jinghao asked first, he hoped to work together to broaden his thinking.

"Lin Suo, I investigated the cave where the body was dumped. According to the village elders, the cave, which had previously been exposed to the slopes, was not covered with thorns until nearly twenty or thirty years. If it weren't for the people of the village, it would have been impossible to know. Moreover, it should be a person over thirty years old who is likely to be familiar with that place. Pei Feng spoke first, but his speech once again showed that their direction was not wrong.

"Actually, I've been thinking about a question. Why did the police dogs of the criminal police team have to walk to the west and then return to the scene of the crime? Gu Qing's detective mind was discovered, and her question made everyone silent.

"You say, could the murderer have wanted to transport the bodies of the three grandchildren to another place and dispose of them. Who knew that halfway through, he suddenly remembered that on the other side, there was a cave that no one knew about, and then, he walked back again? The big tree was the first to say his judgment.

"It is also possible that there was a problem with the transportation he used to transport the body at that time, so he chose to walk back in desperation." Pei Feng then said another possibility.

"That's right, judging from the distance the murderer walked, it is impossible for him to carry three people together by himself, he will definitely use a certain means of transportation, and we should start with the means of transportation." Lin Jinghao suddenly opened his mouth, since there was no progress from the perspective of the investigators, why not change the direction of the breakthrough?

"Lin is right, we should start with transportation." Gu Qing agreed.

"What kind of transportation will it be? A car should be unlikely..."Lin Jinghao muttered to himself, he had completely fallen into his own thoughts.

"Why is it impossible to have a car?" The big tree was a little puzzled.

"When you first start driving a car, do you choose a fast road or a slow road? Also, if you are driving a car and want to avoid the crowds and choose a small road, it should leave traces of tires, and that small road is just enough to accommodate a car to pass. Once he is blocked in the middle of the way, or accidentally falls into the ditch next to him, it is difficult for him to complete the act of throwing the corpse. Also, the most important point is that in terms of the route searched by the police dog, it seems impossible for a murderer who is panicking to throw the body back halfway through the car and then go back the same way. ”

"Also, have you noticed that the murderer should not have been too late to commit the crime. You don't remember, when we went to the scene of the crime that day, although the murderer cleaned up the traces and closed the doors and windows. But the food on the table was not put away. Also, the quilt that slept in the room was not opened. This all shows that when the murderer went to Lao Lin's house at that time, it should have been when they were having dinner. And when he killed someone at this time, he chose to take the path and throw the corpse, which should also be the reason why he took a fancy to the path and few people walked. Therefore, when he transports the body, his means of transportation should be to expose the body, not to completely put the body into the carriage. ”

Lin Jinghao muttered to himself, he felt that his thinking was getting clearer and clearer.