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

Chapter 361 Delayed Killing (Thanks to Seven Cups of Tea for the reward)
Lu Chuan nodded and said: "There are some clues, but the clues are conflicting. I was just about to go up and report to Master and talk to you."

"You just happened to be here, why don't I report to you directly?"

Lu Chuan originally wanted to discuss it with Liu Guodong and the others first, and the four people in the current survey office got together to analyze it, and then asked Qin Yong for instructions if he was still undecided.

Now that Qin Yong is here, he can just say it directly.

"Okay, you say."

Qin Yong pulled a chair and sat next to the experimental table.

Lu Chuan spread out the materials he had just compiled and put them on the table.

"That's right, Team Qin, according to the records in the case files at that time, the current investigation records clearly record that the murderer at the crime scene did not clean up the scene in any way."

"That is to say, under normal circumstances, the murderer will definitely leave traces of his crime at the scene, including fingerprints, footprints or other biological information."

Qin Chuan nodded in agreement with Lu Chuan's point of view. This is the underlying logic of all case investigations.

Otherwise, it would be a fantasy novel about killing people from a distance.

"At that time, the current investigation conducted an identification and analysis of the fingerprints at the scene, and no stranger's fingerprints were found."

Qin Chuan listened to the report and looked through the files again and again. He was the direct commander of the case at that time, but after all, four years had passed and some details could no longer be remembered.

Now that I have opened the file, many forgotten memories have reappeared.

"Afterwards, Master and the others also compared some individual footprints, which belonged to the victim Wang Huifang, her husband Zhang Chao, and some neighbors and other relatives."

"Let's not talk about fingerprints. As for footprints..."

Lu Chuan reported in detail some of his recent discoveries, as well as his reasoning and conjectures.

After a while, Lu Chuan finished his speculation.

"Zhang Chao's alibi and the analysis results of the shoe prints are conflicting."

Lu Chuan spoke in great detail. Not to mention Qin Yong, even the office director on the side heard clearly.

"There is definitely no problem with Zhang Chao's alibi. We reviewed the surveillance video of their unit's conference room at that time and determined that Zhang Chao was having a meeting in his unit when the crime occurred."

Lu Chuan frowned: "Could it be that...the forensic doctor's death identification time was wrong?"

Comparing the forensic doctor's judgment on the time of death of the deceased with the analysis and judgment on the footprint coverage, Lu Chuan preferred the former to the possible error.

After all, the analysis of the footprints is there, and Lu Chuan layered it based on the footprint information in the photos, so this cannot be fake.

But if there was a medical error, Lu Chuan wouldn't believe it.

Four years ago, the only forensic doctor in the Haizhou Criminal Investigation Detachment was Wang Changjiang.

Wang Changjiang's level is not as high as that of top experts in the province, but he is definitely experienced.

When judging the time of death of a body in a normal death case, even if there is an error of one or two hours, it will be overwhelming, and it cannot be more.

"Forensic identification is not a big problem."

Qin Yong pointed at himself: "I was the one who directed the investigation of the case back then. I arrived at the scene immediately after calling the police. I also saw the body. There should be no problem with the identification of the forensic doctor Wang. The time of death of the deceased was 12 in the morning that day. Click around.”

Since Qin Yong said this, Lu Chuan would not doubt it.

After all, based on his experience, such a simple matter would not be misjudged.

On the other hand, the forensic autopsy report is there, with detailed records, so the possibility of error is indeed very small.

But in this case, the original problem comes out again.Two things that cannot happen at the same time, why did they happen?

Qin Yong pondered for a moment: "Lu Chuan, check the system. There was a murder case 18 years ago, and the deceased was named Zhang Miaomiao."

Lu Chuan didn't know why Qin Yong asked him to investigate cases from more than ten years ago, but he still opened the system and called up the case files from that year.

"Captain Qin, it's ready."

Qin Yong came over and said, "Turn the file to the last seven pages."

Page seven?
Lu Chuan was slightly stunned. It seemed that Qin Yong must be very familiar with this case and had a very deep impression, otherwise he would not know which page of the file the information he was looking for was on.

Today's files are not paper-based like in the past. They are pushed in the archives and have to be supervised by someone. It is very laborious to find them.

Now that they have been digitized, all files are scanned. Lu Chuan scrolled the mouse and quickly turned to page 7.

Of course, the archives still exist, but if you put things in, they won't be moved again.

This page is part of the murderer's transcript.

Lu Chuan read it subconsciously.

"The alibi is true. I was not there when I killed her."

"Then how did you kill someone?"

"That's not easy. I tied her to the bed before going out in the morning. I put a knife on her belly and tied a stone. The rope was wrapped around the chandelier and connected to the basin."

"Make a hole in the basin, and the water will flow out. Slowly, more and more water will flow out, and the weight will become lighter. The knife on the other side of the stone will be inserted into the stomach."

"This process will definitely take time. The hole I made is so small that the water will not drain out in two or three hours."

"So when she was killed, I was already out working."

"Then when I get home, I remove all these things and call the police."

After Lu Chuan read it, he understood it immediately.

"Delayed killing?!"

Delayed killing has been around since ancient times.

Lu Chuan had studied these cases when he was in college, including some simple time-delay devices in ancient times, as well as some modern time-delay murder cases from abroad.

The frequency of this type of cases is not high, but it is very representative.

The so-called delayed murder means that in order to create proof of alibi, the murderer first controls the victim, and then uses a simple delay device, such as the water basin delay used by the murderer in the previous case, to use this device to kill the victim. Kill.

Qin Yong nodded: "Although delayed murder is very rare, it does not mean that it does not happen. This case from more than ten years ago is one of them."

“The murderer also provided a perfect alibi. If there weren’t so many traces of water remaining at the scene of the crime, and the current investigation found some traces of friction on the chandelier on the roof of the first room, the case might not have been solved at that time. "

"So, it's possible that Zhang Chao used this kind of delay device to kill people?"

"There is a possibility that, for example, Zhang Chao controlled his wife before going to work in the morning, and then used some kind of delay device to kill Wang Huifang around 12 o'clock."

"At this time, he was having a meeting at his work again. He had witnesses and video evidence, and he could provide a perfect alibi."

"After Zhang Chao returned home after get off work, he removed the delay device and then called the police. This is what we see now."

(End of this chapter)