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

Chapter 436 Caught a clown

For footprint identification and analysis, the ideal situation is to analyze and identify the footprints on relatively soft ground such as sand or mud.

The footprints left on the soft carrier have clear traces and a strong three-dimensional effect, and the analysis of the physical characteristics of the footprint owner will be more accurate.

But in fact, in the identification of footprints at crime scenes, such relatively clear footprints may only appear at crime scenes in the wild.

At indoor crime scenes, most of the floors are floorboards, tiles, or cement floors. There are very few soft floors, so the footprints left behind may be clear, but the three-dimensional effect is not strong.

The more difficult fingerprint identification analysis is that the murderer hides the true characteristics of the footprints by changing his normal shoe size.

Lu Chuan had encountered various kinds of footprints before, but today's kind of footprints were not footprints. This was the first time he encountered them.

The suspect hid his footprints by walking on stilts. It is impossible for ordinary people to judge the suspect's physical characteristics based on these traces.

Although theoretically speaking, the stilts used by the suspects must have different trace outlines and sizes on the ground because of the different directions of force and different walking postures.

This difference should be able to roughly determine the suspect's weight data through more complex mechanical calculations.

What Lu Chuan is doing now is calculations in this area.

However, in addition to weight, other physical characteristics are very difficult to judge, such as height, age, and even professional characteristics. The murderer concealed it very well.

Current investigators are not magic. It is impossible to look back at the crime scene at that time. We can only make certain analysis based on the traces on the scene.

The same is true for Lu Chuan's footprint identification analysis. It is impossible to get the same analysis results as normal footprints through a small mark.

Of course, Lu Chuan does not handle the case alone.

With the suspect's professional characteristics provided by Lu Chuan, the High-tech Zone Criminal Police Brigade started working very quickly.

What's more, there are only a few people engaged in magic and charade work. Early the next morning, only two hours were available to target the relevant personnel.

"Gaofeng, male, 21 years old, is an apprentice of the Red Star Acrobatic Club. He lives in the apartment building where the owner lives, in a rented house on the ninth floor."

peak?

This is the only person in the entire community who works in this field.

"Head, do you want to catch him?"

Yuan Shaokang wanted to give the order immediately, but he paused and called Lu Chuan: "Lu Chuan, how is your analysis over there?"

"The results of the footprint identification and analysis have come out. The suspect weighs about [-] to [-] kilograms. The analysis of trace evidence will have to wait, up to an hour."

One hour?
Yuan Shaokang finally decided to wait. The other party wouldn't run away anyway, so he didn't act rashly. He waited another hour to see what the results of Lu Chuan's trace unlicensed analysis were.

In the trace evidence analysis laboratory, Lu Chuan is doing the final data analysis.

The so-called trace evidence analysis does not actually yield valuable results every time.

For example, some trace substances that Lu Chuan collected at the theft scene include dust, food residue, etc. These things are not specific, so it is difficult to use them as evidence or clues to advance the case.

The more troublesome part of the identification of trace evidence is the purity extraction of the collected materials. In some other criminal investigation detachments, such as the Tianzhou Criminal Investigation Detachment, their spot inspection and trace inspection are set up separately.

The advantage of setting up separate positions is that the criminal police officers in each profession will be more specialized. The on-site investigation criminal police officers are responsible for the on-site investigation and are not responsible for subsequent data testing.He is only responsible for the identification and analysis of the physical evidence returned by the criminal police at the scene. He is not responsible for reasoning, let alone going to the scene.

If your job is single, your skills will improve more quickly.

However, in this way, spot inspection and trace inspection may lead to a situation where each only works for its own work.

For example, during a live survey, I wish I could collect everything on site. Anyway, when I get back, I can just push it all to the trace inspection department for testing.

In fact, when conducting trace inspection experiments, we hope that the things the detectives provide are as detailed as possible. We cannot put several or even more kinds of physical evidence in one species collection bag.

This is especially true for trace evidence analysis, which requires higher uniformity of items submitted for inspection.

Lu Chuan spent a lot of time on purification, which was the most difficult and time-consuming.

The hard work paid off, and the final result came out, showing that the debris left behind by the stains was oak.

"Captain Yuan, oak trees are generally planted more in the south. We rarely see them here in Haizhou City."

"And if you find something made of oak in the suspect's house, you can bring it over for testing. Even if it is oak, the composition of each tree is slightly different."

Lu Chuan's words gave Yuan Shaokang a sense of certainty. From now on, the locking of the peak is actually all reasoning and speculation.

After all, the other party left no fingerprints, no footprints, or any key evidence that could point to the other party at the crime scene.

It cannot be said that the high-strength gel used to open the door is something often used by magicians. The scars found in the room, which appear to be stilts, are often used by jugglers, and Gao Feng is the only acrobat in this unit. Club apprentice, let’s focus on him as a suspect.

What if the other party is caught and it turns out that he was not the one responsible for the fatal bite, or the police are asked to produce evidence?
As for the stolen cash...

Even if it is placed in front of the police, it cannot be counted as evidence. After all, no matter who calls it that thing, it will not agree.

Lost jewelry is too easy to deal with. If Gao Feng had disposed of the items long ago or even hid them somewhere else, there would be no way to find them.

But with Lu Chuan's trace evidence analysis, the results were different.

As long as the stilts can be found at the other party's house, an appraisal can be made, and the results are consistent with the trace evidence at the crime scene, then Gao Feng will not have to run away.

"Haha, thank you Lu Chuan. It's thanks to you this time. Let's go arrest him now and treat you to dinner later!"

The case was not big, but it consumed a lot of energy. Lu Chuan worked overtime in the middle of the night, which is sometimes not common in the investigation of some murder cases.

After the morning meeting, Liu Guodong also learned about Lu Chuan's help in solving the case.

"Lao Yuan and the others have solved their case?"

"Well," Lu Chuan lit Liu Guodong's cigarette and poured him a cup of hot tea: "The necklace and ring that I just caught and stole were found. He was an apprentice in an acrobatic club. He was learning clowning at home when he was caught. Where’s the makeup…”

The other party thought that his work was perfect, and the stolen goods were not disposed of in time. They were left on the coffee table when he was caught.

This saves Lu Chuan a lot of trouble, as he doesn't have to do another appraisal.

(End of this chapter)