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

The body has been pulled back from the scene, and the forensic doctor from the BZ City Criminal Investigation Detachment is doing an autopsy.

Lu Chuan is also working non-stop here.

The first is the fingerprint identification work.

There were not many fingerprints collected at the scene.

There are also many footprints.

But just relying on Lu Chuan to do the appraisal and analysis alone would not be completed tomorrow morning or the day after tomorrow.

There are three people in the current investigation office of the BZ City Criminal Investigation Detachment.

The ability level is actually not bad, almost the same as that of Lao Yang and Lao Bai.

"Let's divide the work. I'll preprocess these fingerprints first, and you'll do the comparison and analysis later."

A total of 108 sets of fingerprints were recovered from the crime scene. If Lu Chuan conducted identification and analysis one by one, it would definitely take a long time, so he decided to preprocess these fingerprints first.

This will not only improve work efficiency, but also improve accuracy.

The fingerprints pre-processed by Lu Chuan are much easier to identify than the original fingerprints.

"No problem, all three of us can get started."

Wang Hao knew what Lu Chuan was capable of.

If the fingerprints processed by Lu Chuan still fail to match, then it may be useless for anyone to come.

Lu Chuan has two things to do here.

The first is the identification and analysis of footprints.

Lu Chuan found 5 sets of footprints with different traces at the crime scene.

But it is a pity that these footprints are left by slippers.

Compared with barefoot footprints or the footprints left by normal shoes, the footprints left by slippers are more difficult to analyze.

One of the most important reasons is that the height ratio of the deceased cannot be determined by the size of the slipper prints.

If this cannot be confirmed, the estimation of weight will be very inaccurate.

Fortunately, Lu Chuan made an important discovery at the scene.

Next to the shoe cabinet at the entrance door, there are three pairs of slippers.

Lu Chuan conducted a blood stain test on these slippers.

It was found that there was blood residue from cleaning on one of the slippers.

Although it is no longer visible to the naked eye, it is still easy to determine this by testing test strips.

This is the biggest clue Lu Chuan has discovered for the time being.

When the deceased was killed, he was lying on the sofa in the living room wearing slippers, and the slippers were soaked in blood on the floor.

Then the slippers that were cleaned at the door had blood stains on them, indicating that it must have been done by the murderer.

In other words, the murderer entered the victim's room wearing these slippers. After killing the person, they were stained with blood, so they were cleaned at the sink.

Of course, not only did the other party clean the slippers, but probably other things as well.

This is why Lu Chuan found blood stains in the pipe under the sink.

Lu Chuan is now identifying these blood stains to confirm whether they are the blood stains of the deceased.

Another thing, Lu Chuan made another important discovery next to the sink.

Half barefoot footprints!

Yes, after Lu Chuan confirmed that the murderer had washed his slippers, he carefully inspected the area around the sink again.

Because if the other party cleans the slippers, he must take them off his feet.

Even if the other party is very cautious, dragging and washing one by one, there is no guarantee that the foot without the slipper will not fall on the ground during the washing process. Sure enough, Lu Chuan found half a bare foot footprint.

It's bare feet, not the kind with socks on.

This will be of great help to Lu Chuan’s subsequent footprint identification and analysis!

Bare foot footprints play a much greater role in providing basic information such as the owner's height and weight than normal shoe footprints.

In addition to this work, Lu Chuan also needs to conduct identification and analysis of trace evidence collected at the scene.

Of course, since BZ City did not have the corresponding equipment for this work, Lu Chuan had already asked Li Donglin for instructions, and the items were immediately sent to the provincial technical appraisal center.

They will also conduct testing overnight, but the results will not be available until noon tomorrow at the earliest.

Another task is to restore the scene.

The first scene where the deceased was killed was on the sofa in the living room. Judging from the blood spray at the scene, the spatial relationship between the murderer and the deceased at that time can be restored to a certain extent.

Because the murderer did not clean up the ground after the murder, there were a lot of dripping, spraying, and swaying blood stains that were very clear.

This allowed Lu Chuan to reconstruct the scene of the crime based on the shape of the blood stains.

In addition, based on the traces of blood dripping, bare foot footprint analysis can also be used to determine some basic physical information of the murderer.

Time passed quickly.

"Team Lu, the fingerprints are almost finished here. The fingerprints we collected have been confirmed. Except for the two fingerprints on the door that matched the two takeaway guys, the others belong to the deceased and his wife."

At 3: in the morning, the identification and matching of fingerprints was finally completed.

However, no very useful information was obtained.

Lu Chuan had already predicted this. The murderer could kill three people in a row, so he would not make such a low-level mistake.

"The previous three scenes were similar, right?"

Wang Hao yawned: "It's almost the same. I collected a lot of fingerprints, but none of them are useful."

"The other party must have been wearing gloves after entering the scene."

"Lijun, how are you doing? Have you finished the footprint identification?"

Although the bare feet at the scene were estimated to be less than half or less than 2/3, Lu Chuan had already done a more detailed data identification analysis based on the footprints, and the results had already come out.

"That has been completed. I am mainly doing blood stain identification and analysis. It will be completed soon and I will report after dawn."

Although physically exhausted, Lu Chuan was still quite excited mentally.

Bloodstain identification and footprint identification complemented each other, allowing Lu Chuan to get some valuable clues.

"That's great, is there anything in the Army that we can help with?"

Wang Hao and the other two current surveyors also came over.

Although they haven't had much rest this week, today is much better.

At least fingerprint identification is really much easier.

"I only have some data left to calculate. You guys should take a rest first. You haven't slept much this week, right?"

Lu Chuan discovered during the day that Wang Hao and his men had red eyes and looked listless.

After all, there were three murders, and the on-site investigation alone was enough to defeat the human race, not to mention the need to go back and analyze and judge the collected clues.

Wang Hao smiled bitterly: "Why are you still sleeping? There were three murder cases. If the crime team hadn't come, we would probably have to answer for this."

"Lijun Lu, you're welcome." Wang Hao turned around and said, "Get some sleep quickly or you may die suddenly."

They wanted to catch up on sleep in the past two days, but they couldn't. Gao Xiang and the others were watching.

How to sleep? (End of chapter)