Kanayama reasoned. "The cement in the hands of the deceased builder should not have solidified at that time, and now the factory is suspended, that is, if this is the first scene, then after they killed someone, no one has been here since then, no blood was found at the scene, it may have been washed away by heavy rain, and now we can't find any physical evidence, and the murder weapon was also taken away by the murderer."

Ace reasoned. "The first scene of the crime happened at night, I think there must be clues for us at the scene, if the murderer did not come back to clean up the scene after that day, we must have found something at the scene."

Kanayama reasoned. "The scene is very monotonous, at a glance, there is nothing, since the construction worker was killed on the construction site, then we start the investigation from the people on the construction site, I think from these people can find some clues that have disappeared."

Ace reasoned. "The construction worker assumed that he was killed in Li, and then transported the body out and buried it, here we can see that an acquaintance did it, the construction worker was killed at night, what is their motive for killing, and the construction worker is not there except for his belongings, the others are still there, the murderer is not killing for money, the construction worker is a good person, he has not offended other workers, who killed him."

Kanayama reasoned. "It can't be that someone from the outside came in and killed him, and it can be completely ruled out that someone from outside is committing the crime, that is, the suspect is inside the factory, and we can investigate these people."

Ace looked at the shoe prints on the ground and said to Jin Shan. "You take the shoe prints for identification, I'm looking at the scene."

Jin Shan didn't say a word to pick up the survey box in his hand, extracted the shoe prints on the spot, after extracting the shoe prints, he took them to identify, the ace observed the scene, the scene is divided into four directions, the left is the temporary iron square, the back is the construction site, the right, is the road with the construction trolley, and there are piles of sand on the road, all used for construction projects.

The front is an iron wall, there is a mud truck in front of the iron wall, and it is also a mud truck used by the deceased, next to the mud truck, there is a temporary shack, and there are some cement bags in the shack, some rotten cartons, some waste wires, nails, it can be seen that this is a place to put waste products, and the ace turned over the things inside, since a section of steel bars was found inside, and there were blood stains on it, it was determined that the scene was here, and the ace pulled the police line around the scene; After the ace pulled the police line, he used the camera to take photos of the scene and fix it, and then carefully inspected the scene.

As soon as Boss Fan heard that the crime scene was at the construction site, he was so scared that he couldn't give up, it was not that he killed people with a weak heart, but that there was a murder here, how did they explain to the customer, this is developed for sales building, if people know that there are dead people here, who will come here to buy a house, this is not a good sign, he is naturally very scared, once the customer asks, he has no way to say clearly.

As soon as the workers heard that there was a murder here, and the deceased was a construction worker, they all felt sorry for the construction worker, who killed such a good person, and the workers all provided some clues that could help the police, to find out who the murderer was, it seems that the workers also hated the murderer, and a good person was killed like this, and no one could look past it.

It took Jin Shan a few hours in the appraisal room to identify the shoe prints at the scene, and there were a total of three people's shoe prints at the scene.

The shoe prints are divided into A, B, C, three people, the deceased is A, B is the suspect's shoe prints appear a little more at the scene, the shoe prints are identified as the pattern of brand-name leather shoes, the suspect is about 168 cm tall, fat, and about 40 years old.

The shoe print of suspect C is a high-heeled shoe, that is, the suspect at the scene is a woman, and judging from the length and width of the footprints, the height of the suspect is also consistent with that she is a female figure.

The high heels are also brand-name pattern shoe prints, the suspect is about 162 tall and thinner, and the C suspect is a female shoe print.

Soon Jin Shan separated the shoe prints of the three people ABC, at that time A was the shoe prints of the deceased, so there was not much to identify, B and C were the shoe prints of the suspects, and Jin Shan carefully identified them.

Ace took the blood on the steel bar found at the scene to Zhou Ling for identification, the identification result was that the blood on the steel bar was the blood of the deceased construction worker, Jin Shan returned to the construction site, on the construction site that night, everyone who went to work was called to the scene by the ace, the murderer must be among them, Boss Fan also matched them, more than 40 workers appeared on the construction site, the ace looked at them, Jin Shan identified from the shoe print, the suspect has a woman, a man, but there is no woman among more than 40 people.

Jin Shan asked more than forty people. "Are all of you all here, all men, no women?"

A worker replied to Jin Shan. "Comrade police, the construction site is full of big men, where are the women from, the construction site is so hard, there are no women here to work."

It is normal for women to appear on the construction site in the current society on the construction site, but it is normal not to appear on the construction site, Jin Shan thought that the suspect's shoes are famous brands, she cannot be the person who works on the construction site, but the shoes of the male suspect are also famous brands, Jin Shan looked at Boss Fan, he is also a famous brand shoes, but the height is not right, the body shape is not right, Jin Shan observed the feet of more than 40 people, he came to a conclusion, if they were all working at the time, it would be impossible to wear brand-name shoes, and now it is the same, The shoes worn by the workers are some liberation shoes, sandals, that is, there are no brand-name shoes, there is a person in more than 40 people, and the dress is OK, but the shoes are also brand-name Nike shoes, although they are not leather shoes left on the scene, but Jinshan pays attention to this person, and this person is the contractor here, he is the boss's contractor, and the boss's project is all he helps the boss take care of, and only he does not have to work, and only he meets the requirements of the person who wears brand-name shoes, but there is also a woman's shoe print on the scene, there is no answer for the time being, Jin Shan looked at this person, he couldn't make up his mind, he thought about it for a long time, he had no choice, and then said a few words in the ear of the ace.

Ace walked up to the foreman and said to him. "You come out and cooperate with our investigation."

The foreman of the contractor walked out very comfortably. "Comrade police officer is looking for something about me." The foreman's answer was very comfortable, and he couldn't see anything unusual at all.

Ace continued to ask the foreman. "Where were you last Saturday night and what did you do?"

When the contractor heard the trump card's words, it was not groundless, and he also answered the trump card confidently. "Comrade policeman, the proprietress said on Saturday night that she bought something at the supermarket and asked me to drive him back, and I haven't been back here all night."