Yang Sen handed Liu Guodong a cigarette and took over the conversation: "Brother Liu is right. The deceased should have died of homicide. Now I will be busy at night."
Bai Wenhai opened his arms, stretched out, and took the cigarette handed over by Yang Sen: "Xiao Lu, you have just joined the work and have insufficient experience. The less things we find at a murder scene like this, the more problems we have. The bigger it gets.”
Bai Wenhai pointed to the evidence collection box in the carriage: "You see, we have been busy for a long time, but we only collected a dozen fingerprints in the living room where the deceased died, and there was only one type of shoe print. I guess it should be that of the deceased's son. "
"He had entered the living room before reporting the crime in the morning, so he would naturally have left shoe prints. If the deceased committed suicide, at least we would have collected the shoe prints of the deceased."
Bai Wenhai took a puff of cigarette: "But the scene was very clean. We did not find the deceased's shoe prints. This means that someone must have deliberately erased the marks."
Yang Sen sighed: "The other party was very careful and wiped the traces very thoroughly..."
Lu Chuan listened quietly to the three seniors chatting. This was the best time for him to learn and gain experience.
In school, Lu Chuan learned techniques, such as how to collect fingerprints and collect blood, but what these things represented was not something the school could teach.
This requires Lu Chuan to accumulate on his own, such as Bai Wenhai and Yang Sen. When they were doing on-site surveys, their methods were not professional. After all, they were monks halfway.
However, they were able to discover things other than technology. They could basically confirm that the deceased did not commit suicide without even waiting for the autopsy report.
Back at the detachment, there is no hot meal available in the cafeteria at all times. This is probably part of the mechanism for murders. Meals are usually served at fixed times. When a murder occurs, the logistics support personnel are actually no more free than those on the front line.
In the words of captain Qin Yong, the people on the front line are working hard, and they can't go back to the team without hot food to eat.
3:15 p.m.
The four people in Lu Chuan began to classify and identify the evidence collected at the scene, especially fingerprint comparison and DNA sample analysis, which were key tasks.
Liu Guodong went to the case analysis meeting first. Lu Chuan and the others were not qualified to participate in the meeting and could only work in the laboratory.
Even though there are only four people in the on-site investigation office, on-site investigation is the richest department in the entire criminal investigation detachment.
Nothing else, the equipment is expensive.
One DNA testing instrument can bring down all other departments.
This thing is also the lifeblood of the current investigation office. It was purchased last year. In the past, the criminal investigation detachment had to go to the technical identification department to do DNA identification. Not only did they queue up, but sometimes they had to look at people's faces.
Yang Sen was responsible for operating the instruments, Bai Wenhai was responsible for organizing the evidence, and Lu Chuan was responsible for sorting out the photos and writing the investigation report.
The investigation report is one of the most important parts of the file. Writing a file is different from solving a case.
To solve the case, you can use logical reasoning, guessing, and doubting.
The dossier is a statement of facts, recording everything at the scene in detail with photos, numbers, and text.
It was already half past six when Liu Guodong came back, thirteen hours had passed since the death of the deceased.
"Brother Liu, how was the meeting?"
Liu Guodong looked a little deep: "I have made a detailed report on the current investigation. From the analysis of traces on the scene, it can be determined that it was homicide."
"But the autopsy hasn't been completed yet and there's not much progress on the specifics."
call……
The nature of the case is certain, and everyone’s heart is heavy.
"Okay, let's do our own thing and complete the on-site exploration analysis report as soon as possible."
Solving a case is not based on passion. Each of the forensic scientists, investigators, and investigators must do their own thing well and work together to advance the investigation of the case.
In the conference room No. 1, Qin Yong looked at the relationship diagram on the whiteboard with a gloomy face.
The community where Zhang Wen's family is located is an old community with outdated facilities and the few surveillance cameras that are out of order.
In addition, the community has no walls and is an open community, which makes the visit and investigation very difficult.
Zhang Wen's interpersonal relationships have been basically sorted out. His divorced wife is not in this city, and his second wife and the children brought by her husband returned to her parents' home in the next city the day before the incident.
The reporter was the son of Zhang Wen and his ex-wife. He originally took Zhang Wen to the hospital for a physical examination in the morning. There was no answer when he called the door. He opened the door with the spare key under the footrest and found that Zhang Wen was dead.
Neighbors can attest to this.
In addition, Zhang Wen has a simple social background and has no enemies.
In the early hours of this morning, the surrounding residents did not hear any unusual sounds.
In addition, the murderer did not leave any traces at the crime scene, and the investigation of the case reached a dead end.
Qin Yong can only hope for the autopsy results to see if there are any valuable findings.
The current survey office.
Liu Guodong brought back meat-filled buns from the cafeteria: "Come on, take a rest. The cafeteria will make buns tonight, stuffed with donkey meat. Eat them while they're hot."
Lu Chuan and the others put down their work and came to the desk: "Master, is there any progress in the case?"
Liu Guodong handed Lu Chuan three meat buns. He understood Lu Chuan's curiosity very well. He was even more curious than Lu Chuan when he encountered the first murder case.
"The autopsy report has come out. The cause of death was that the heart was pierced by a sharp object, but the wound showed signs of repeated stabbings. This is consistent with our current investigation conclusion. It was a fake suicide scene."
The so-called repeated stabbing means that the knife was inserted, pulled out, and then inserted again.
This is not to say that suicide cannot be stabbed repeatedly. Generally speaking, if a person is determined to commit suicide, he may not feel pain in the short period of self-injury. Therefore, in order to die quickly, repeated stabbing is possible.
But a stab in the heart is different from other parts. With such a critical stab, the deceased will lose strength in an instant, and the possibility of repeated stabbings on his own is very small.
Lu Chuan nodded and did not continue to ask. The current survey had the scope of work. At this stage, their work had actually come to an end.
It can be heard from the conversation between Yang Sen and Lao Bai that they have no plans to work overtime at night. Yang Sen's child will take the college entrance examination next year and he will definitely go home to take care of the child.
Lao Bai is fifty years old. After a busy day, his physical strength cannot support him and he has been dozing off.
It was impossible and unqualified for Lu Chuan to ask the two seniors to work overtime.
But he also has systematic advanced tasks.
Although there will be no punishment if the task is not completed, the reward will definitely be lost.
Three times, five times and two times to eliminate three donkey meat buns, Lu Chuan went back to study the current survey data.
Liu Guodong glanced at him and said nothing. When he first joined the police, he was so motivated.
Young people are like this, just like people under a certain age don't understand what prostate rebellion is about.
Who has not achieved the feat of the Seventh Generation?
Thanks to his basic on-site survey photography skills, Lu Chuan organized the on-site photos into categories and organized them. When he turned on the computer, Lu Chuan started with an overview of the site and did not miss any detail.
The advanced tasks given by the system are: through on-site investigation, discover clues to solve the case and assist the task force in solving the case.
This shows that there must be clues to solve the case at the scene, but Lu Chuan has not discovered it yet.
With a click of the mouse, Lu Chuan enlarged each photo and carefully observed every detail.
Starting from panoramic photos, to close-ups of corpses, details of blood stains, and even every item on the coffee table and the trash can in the corner, Lu Chuan didn't miss a single thing.
But zooming in and viewing each of thousands of photos is not an easy task.
Liu Guodong and others naturally noticed Lu Chuan's behavior, but they did not interrupt him.
They are older, and they are not from majors themselves, so their room for advancement is limited. What they can teach Lu Chuan is the experience they have gained over the years.
Of course, it's not that they are not motivated, just like why Empress Dowager Zhao fell in love with Lao Ai back then. Good skills are one thing, but the key is to have physical strength to keep up.
The three of them, Liu Guodong, were obviously exhausted.
Lu Chuan, who had seen more than 400 photos, twisted his stiff neck and grabbed the cigarette box next to the computer, but did not fumble for the cigarette.
Lu Chuan reacted and looked at the clock on the wall. It was already past two in the morning.
No wonder a pack of cigarettes had been wiped out. Lu Chuan had been looking at them for more than seven hours.
Lao Bai and Yang Sen had gone home long ago, but Liu Guodong had not left. He was lying on the sofa in the office and snoring.
Lu Chuan walked over and covered Liu Guodong with a blanket, grabbed the cigarette on the desk, and lit it.
Taking a deep breath, the strong smell of tobacco cheered up Lu Chuan's spirits a little.
Flick your index finger to shake off a bit of cigarette ashes.
Um?
Looking at the cigarette butts that were almost filling the ashtray, a thunderbolt flashed through Lu Chuan's mind.
Cigarette butts?
After stubbing out his cigarette, Lu Chuan ran to the computer and quickly flipped through photos of the scene with his electric mouse.
After a while, a photo appeared on the screen.
