Chapter 147 Footprint Expert

Case handling center.

The leaves of the green radish in the corridor are black, like old green radish that no one cares about.

Several old criminal police officers teach Jiang Yuan the ropes.

In the interrogation room, what should be said and what should not be said.

In the interrogation room, the criminal suspect Liu Chang has just finished reading the "Notice of Criminal Suspect's Litigation Rights and Obligations" and is signing it.

The main person in the murder case, even if it is the county public security bureau, will try to follow the textbook step by step.

Otherwise, there will be people who want to teach you how to do things.

"What's your name?"

"Liu Chang."

"Have you used other names or nicknames?"

"No."

"What's your ethnicity, date of birth?"

...

"I want to see the footprint expert." Liu Chang answered a few words, and suddenly he didn't want to cooperate and shouted.

He looked a little flustered, his face was very pale, and he wore half-frame glasses, but to be honest, he was still a good-looking young man.

He was also tall, which was quite advantageous.

Wu Junhao, who was sitting opposite him and looked particularly strong and muscular in his police uniform, patiently coaxed him:

"Didn't we agree to take notes first, and someone will come soon."

"It's been so long, they should be here. If they can't come, just say so directly, don't lie to me." Liu Chang's expression became more serious.

His expression kept changing.

Wu Junhao was very fierce when arresting people, but he was very kind when interrogating them, and still advised: "There's no need to lie to you. If you want to see someone, they have to notify you, then come over, and then come in to see you..."

"You just said a quarter of an hour."

"It's not here yet."

"Then show me the time."

Wu Junhao froze again, it's not good to show the time to this thing, this is the basic rule of interrogation.

"Then I want to see my dad." Liu Chang made a new request, but this request made the faces of people inside and outside the interrogation room change.

25-year-old young people are still easy to fool.

People who enter the interrogation room will have all kinds of strange ideas.

There are many people who imagine that their crimes are minor and feel that they are innocent.

Liu Chang thought that he was an accidental murder and believed it firmly.

This is the basis for everyone to talk.

In a real interrogation room, there will be at least one idiot. This is the so-called interrogation room principle.

Liu Chang's brain suddenly came back to normal, which is the most nervous part.

If he refuses to confess, the subsequent handling of the case will be difficult.

It can be said that the happy life of hundreds of cadres and police officers in the next week or two depends on Liu Chang's attitude at this time.

As for Liu Chang's father, he is a 50-year-old official with a certain official title. It is an understatement to describe him as difficult.

"You are already 25 years old and do not need your parents to accompany you." Wu Junhao suddenly said, piercing Liu Chang's sensitive heart.

He has seen too many teenagers who want to become men with words and roars.

A slight prick of the muscles related to "growing pains" will explode on the spot.

Liu Chang really became angry, his hands were shaking, and he yelled, "I want to see the person who left the footprints, hurry up!"

He stopped yelling to see his father.

Wu Junhao breathed a sigh of relief, but he didn't dare to interrogate him again.

Liu Chang's father was actually being interrogated next door.

Liu Chang's father was much more experienced.

At first glance, he was the kind of leader with a little power. When he was just arrested, he was still in an official tone and a little fierce.

This kind of person has a steel-like will in most situations, just like the feces in a pile of stones exposed to the scorching sun, the surface is slippery and the shell seems hard, but it is empty when it is smashed open.

But for Lao Wu, he is not worried about the interrogation of Liu Chang's father.

For people like him, the simplest way is to grind them with water. No matter how hard the feces are, soak them in water for a few days and stir them with your hands, they will melt.

Old people have power and money, and they are corroded quickly, and they have many weaknesses.

On the contrary, young people like Liu Chang have drastic mood changes, are very unstable, and are easy to change their confessions.

Just now he was explaining everything in the car, but he changed again in the interrogation room. God knows what weird behavior he will show next.

People who have killed people have some psychological problems to a certain extent.

Wu Junhao didn't want a clear murder case to become a snotty case.

Outside the interrogation room.

The professionals also realized that Liu Chang's emotions were out of control, and they hurriedly told Jiang Yuan a few words before letting him in.

A group of people stared at the surveillance camera expectantly, clenching their fists, as serious as the fans of the home team.

Jiang Yuan knocked on the door and entered the interrogation room.

Wu Junhao used the largest interrogation room, which was long and wide, and was blocked by iron railings at one-third of the door.

Liu Chang sat inside and couldn't even find a window, and the spotlight above his head made him feel irritable.

The so-called "tiger bench" was also filled to the brim.

The 1.93-meter-tall man pulled the stool to the highest position, his legs were sticking out, and his arms were placed on the table, so that the handcuffs could hardly be locked.

The two restraints at the back were fine, but Wu Junhao did not put them on him.

This thing was uncomfortable to put on, and it was definitely more uncomfortable than the seat belt. He was afraid that Liu Chang, who turned himself in, would be unhappy.

Before the criminal confessed, the police were like caring big brothers.

Only when he fell into the hands of the police would the fierce side of the police be revealed.

Mature policemen are usually like mature scumbags.

And immature policemen are usually like immature scumbags.

Jiang Yuan is also very tall. When he first entered the door, under the strong light, he almost saw himself sitting inside...

Liu Chang was almost the same. In a blink of an eye, he almost saw another self walking in.

The two seemed to be a little dazed when they faced each other.

Liu Chang was also a legitimate second-generation official in a small place, and he seemed to have no worries about food and clothing.

"This is our footprint expert, Forensic Doctor Jiang." Wu Junhao gestured to Jiang Yuan to sit next to him, and then introduced Liu Chang to sit down.

"How old are you?" Liu Chang shrank a little, but asked first.

Jiang Yuan saw such a young suspect. Although he had seen the case, heard about it along the way, and saw it outside, he still felt very weird when he really faced him face to face.

"24 years old."

"Younger than me?" Liu Chang suddenly looked at Wu Junhao excitedly! His feet were shaking:

"Who are you going to get? A fake one, is that interesting?"

Wu Junhao was stunned, and then slapped his thick forehead with his big hand.

"You should have said it earlier. We have so many people, it's convenient to get a fake one. Do you think the expert should be in his forties or fifties, preferably with white hair, or with less hair?"

Wu Junhao wiped his greasy hair and continued:

"If I had known earlier, I would have got a policeman without hair, and asked Jiang Yuan to come from so far away. Our team lacks everything except age and baldness."

Liu Chang was speechless.

And he felt that what the strong man said made sense.

He looked at the young man opposite him seriously again.

"How did you know my height? I heard that the last footprint expert was also a famous footprint expert in the province."

His question was a little professional, which showed that he had indeed learned about it in advance.

Jiang Yuan asked back: "Why do you care about this?"

"I just want to know. I am much taller than normal people. When the accident happened and I saw the footprints all over the ground, I knew there was a problem." Liu Chang said calmly: "I decided to report a lower height myself."

With just this one sentence, Liu Chang revealed a lot of information.

If what he said is true, first of all, it means that Liu Chang did not know the judgment of the previous fingerprint expert on his height.

In other words, his father's relationship did not leak the information of the case.

Chen Wenming judged that day that he was 178 to 185, so Liu Chang was just too tall. Otherwise, if he reported 185, he would have been in range. At that time, the special case team must have been several times more intensive in identifying him.

Secondly, Liu Chang said that he decided to report a lower height, which means that someone decided other things for him.

Most likely it was his parents.

In other words, this sentence proves that his parents did cover up.

Finally, Liu Chang also revealed his mental state.

It is not new that young people want to decide their own future and want to fight the world with their own cognition.

However, some people eventually became the father of the nation because of this - Sun Yat-sen is the one.

Some people ended up being just a murderer - Qin Wuyang is the one.

Jiang Yuan looked at Liu Chang deeply.

From the feeling of him face to face, does this guy still want to learn something?

Do you think that you can still come out after accidentally killing someone, and want to make some preparations for the next time?

"If you don't say it, I won't say it either." Liu Chang felt that he could control Jiang Yuan.

Jiang Yuan smiled and said, "Judging height is actually a systematic job, and it's all in the book."

"I just want to hear you say it."

"Well, the simplest point is to judge height based on foot length. There are some empirical rules."

Jiang Yuan said slowly, "For example, in ancient China, there was a rule of standing seven and sitting five and lying three, which means that the average person's height is seven times the length of the head, and the length of the foot is actually about the same as the length of the head."

"Isn't it said that some people have a nine-head body?"

"That's a special case. Let's talk about the general rule first."

Liu Chang agreed, "Okay, so it's multiplied by 7?"

"People in Shanghai multiply by 75, people in Northeast China multiply by 876, people in Shaanxi multiply by 734, people in Chongqing multiply by 856..." Jiang Yuan gave a comprehensive answer directly.

"But I wore shoes that day!" This is what Liu Chang is most concerned about.

"And the shoes he wears are smaller than normal, so they squeeze his feet, and the size is different from usual."

"Can you tell?"

"I can tell." Jiang Yuan nodded and asked, "Shall I continue?"

"You go on."

"To further judge the height, we need to add the data of the width of the feet. Although your feet are longer, they are wider than normal. This is another detail."

Liu Chang listened to the young forensic doctor in front of him and actually agreed with him:

"Chinese people's feet are generally wider than Europeans, so foreign brands of shoes are easy to pinch their feet when worn."

His feet are too wide, and he feels that it is not easy to buy shoes.

"Then there is the area of ​​the sole of the foot and the width of the plantar. When these two data are added, the regression equation formed has a higher usability." Jiang Yuan also said it very carefully, anyway, it is all public information.

And according to the interrogation experts, it is good to talk to Liu Chang for a while at this time.

Liu Chang frowned a little when he heard the regression equation, and said, "You are still talking about the average data. How do you know my height is 193."

"The real conclusion should be 191 to 195. I judge that 193 is the most likely." Jiang Yuan replied.

He explained: "In fact, it is still a component of experience. In addition, there are indentations and stride length..."

... The leaders outside the interrogation room were all confused, some confused, and some did not understand. Watching the conversation between the young forensic doctor and the young criminal suspect inside, they really saw a sense of urgency like in a TV series.

It was wonderful and indescribable.

"Can you tell me in detail?" Liu Chang asked.

"It's your turn." The muscular old Wu interrupted and said, "Let's make up the interrogation record first, and then you can talk about the rest in detail."

"What to make up." Liu Chang leaned back slightly again, but the iron chair could not lean over, which made him frown slightly.

"First, tell me why you want to kill people." Wu Junhao did not walk in order and asked directly.

Liu Chang curled his lips: "Didn't I say that?"

"Now it's a formal interrogation. If you say it now, it will be considered as your surrender..."

Liu Chang raised his head and said slowly: "I was also stupid at that time. I bumped into his son and cursed back and forth. The boy was wearing tattered clothes..."

Recalling the scene seven years ago, Liu Chang also had a trace of regret. He shook his head and said: "Anyway, I wanted to make up for it. I happened to be there that day, so I rode a bicycle to his house. As a result, I ran into his father. The old man wanted to fuck me, so I had to go back and accidentally..."

"How do you know where his home is?"

"The kid said it himself. He said that down the county road, there are two big lions with wings. That's their home." Liu Chang's voice became fainter and fainter...