Chapter 324: Mechanics

The arrest of the entire security team first frightened Yuan Yuan Jiansheng.

Immediately after, Yu Yu Wenshu began to receive phone calls frantically.

Yu Yu Wenshu had expected this long ago. Without any change in expression, he answered the phone calmly, explained with similar perfunctory words, then hung up, and waited for the next round of calls.

Shen Shen Yaoguo was actually about the same, but he wasn't as calm as Yu Yu Wenshu. He found a place to hide and answered and hung up the phone with a full face of smiles.

The two were like two telephone operators, each making their mobile phones hot, before the frequency gradually decreased.

"Looking at the detachment captain from outside the office, I thought the detachment captain was planning strategies. Only after entering the office did I know that the detachment captain is just a mouthpiece, a machine for answering phones." Yu Yu Wenshu hadn't received a new call for nearly 3 minutes before he exhaled and shook his head at Jiang Yuan with a smile.

Jiang Yuan understood very well: "Passing information up and down, it belongs to the intermediate link of planning strategies."

When he was eating from a hundred families in Jiang Village, he still knew how to read people's faces. It was only after the demolition made him too rich, plus he went to college, that he gradually abandoned this skill.

Yu Yu Wenshu laughed out loud. As long as Jiang Yuan didn't step on his face with his feet, he could be very happy.

At this moment, Jiang Yuan was willing to say a pleasant word, and Yu Yu Wenshu's ears, which had been burned by phone calls, seemed to be healed.

"It's fine, just let it be. When it involves these key provincial and municipal enterprises, there will always be people coming to plead. Pleading is fine, some people even want to understand the situation... Actually, it's all useless work. Criminal cases are all filed for investigation and have entered the arrest environment. At this time, pleading and understanding the situation, in my opinion, are just going through the motions. I'll accompany them through the motions." Yu Yu Wenshu hummed twice, mainly to ease Jiang Yuan's state.

Jianyuan's parking lot security team had been brought back without missing a single one, but for the next link, Jiang Yuan still had to lock in some evidence.

Of course, Yu Yu Wenshu believed that with a mix of threats and deception, they should be able to hold onto a few people. However, looking at Zhang Xiang's appearance of not releasing the eagle until seeing the rabbit, he knew that using this method, the difficulty would definitely not be small, and he shouldn't count on being able to pin everyone down.

"The next part depends on you." Yu Yu Wenshu had fully prepared to be a cheerleader.

Jiang Yuan had also been preparing all along. At this moment, he nodded and said: "Then according to the plan, let's look at the equipment and instruments they brought back first."

Jiang Yuan himself was also trying to use different techniques to solve the case.

Combine harvesters also need to have a work order.

For today's case, Jiang Yuan felt that he still had to fully utilize his level 6 tool mark identification skill.

With level 6 tool mark identification skills, the accuracy and speed of identifying normal tools are top-notch. It basically belongs to the category of knowing whether it matches the current case at a glance.

Moreover, because he was too familiar with tool marks, Jiang Yuan could memorize many tools and marks involved in the case files in one breath—although it was only temporary memory, it greatly improved work efficiency.

If ordinary trace examiners were doing tool mark identification, the common practice was to observe first, not just with the naked eye, but also with horseshoe gold and microscopes.

The purpose, besides looking for features, was to record the size, magnitude, shape, and outline of the marks. A more standard practice was to draw feature diagrams.

Jiang Yuan was equivalent to skipping these intermediate steps, and it was many-to-many memory, simultaneously remembering the features of multiple marks, and then comparing multiple tools.

The Criminal Science and Technology Center under Wan Wan Baoming also sent trace examiners to help at this time. Three young trace examiners in their 20s or nearly 30s were at the age of learning new techniques and methods. Looking at Jiang Yuan's approach, their faith almost collapsed.

"Captain Jiang, there are still many tool marks involved in the case files here. Why don't we look for so many first?" A trace examiner flipped through the case files, showed Jiang Yuan a few photos of tool marks, and couldn't help but say.

After showing Jiang Yuan the tool marks of more than a dozen cases in one breath, he began to doubt and feel uncertain.

Could someone really remember so many?

Jiang Yuan was too lazy to explain, so he said: "Then draw some feature diagrams to strengthen the memory."

Feature diagrams are different from fingerprint feature points. Fingerprint feature points are for computer software to see and for the court to see. Tool mark feature diagrams are for oneself to see.

Therefore, feature diagrams can be drawn very simply, and they don't need to be good-looking or realistic. Just a few strokes to express the mark features are enough, or it doesn't matter if they can't be expressed, as long as the person drawing them understands.

Thus, the three young trace examiners witnessed Jiang Yuan's "dragon-flying and phoenix-dancing" style.

If one were to talk about it, Jiang Yuan still had sketching skills available, but the only thing that could let sketching play a role in drawing this feature diagram was the lines.

By the end, Jiang Yuan even began to use a single line to draw the entire feature diagram.

The three young trace examiners didn't dare to speak, nor did they understand. They just stared blankly at Jiang Yuan's operation and tried to hold onto their shaky skill trees.

"Found one. This pry mark number A27 should have been done by the wire cutters B109. Let's see what kind of case it is."

When Jiang Yuan started to really do the case, the three young trace examiners were truly stunned.

The so-called A27 was numbered by Jiang Yuan himself; the A series represented the marks that appeared in the case files. B109 was the tool brought back by the criminal police, starting with B and numbered in order, photographed in sequence. B109 also represented the photo number.

Hundreds of marks, hundreds of tools—to force memory was simply like a joke.

But for level 6 skills, classification memory was just a piece of cake.

A trace examiner quickly took the photo of A27 and the physical tool of photo B109.

Just looking at A27, it was a lock bar of a sliding window, with obvious pry marks on both the front and back, knowing that Jiang Yuan wasn't guessing blindly.

The three people couldn't help but surge forward to compare the wire cutters represented by A27 and B109.

Seeing that the width of the top of the pliers was consistent, the number of tooth patterns on the side was also consistent, and comparing the concave and convex points carefully, they also seemed to be consistent—the three looked slowly and couldn't confirm they were the same yet, but not finding any wrong points almost already explained the answer.

"How did you find this?" The youngest trace examiner couldn't help but reveal a trace of longing in his eyes. This was a martial arts secret manual. Whoever mastered this skill would truly be able to walk the world without fear.

"How did you find this?" The youngest trace evidence examiner couldn't help but reveal a hint of longing in their eyes. This is a martial arts secret manual; whoever masters this skill truly has nothing to fear anywhere in the world.

Everyone listened carefully to the first half of Jiang Yuan's sentence and tried hard to memorize it.

For the second half, the light in the eyes of the three young trace examiners slowly faded.

If you study tool mark inspection deeply, you are studying the action of force, such as the common action and reaction forces, stress, external force... as well as the very important direction of force, the magnitude of force, the contact relationship of points, lines, and surfaces, etc.

But as everyone knows, once it involves mechanics, whether it is theoretical mechanics, material mechanics, structural mechanics, fluid mechanics, elastic mechanics, plastic mechanics, damage mechanics, fracture mechanics, vibration mechanics, explosion mechanics...

None of them are good things.

"I'll go get the photos." The young trace examiner revealed a sensible smile.

"I'll go get the case files." The slightly younger trace examiner followed closely behind.

"I... I'll pour you some water." The adult trace examiner bent over, his face full of piety and obedience. ===== CHAPTER 325 =====

"I... will pour water for you." The adult trace evidence examiner bowed their head, their face full of piety and obedience.