The male partner is wearing it quickly, paranoid villain, why are you locking me up?

The mixed smell of blood and urine was not pleasant, and accompanied by gusts of cold wind, it came from all directions, making people shiver with nausea.

The temperature in the interrogation room dropped sharply.

Leaving aside summer, even winter when the temperature is low should not be as gloomy and cold as it is now.

Decay mixed with death.

Something is wrong, very wrong.

Wei Chongzheng also felt the coldness on his skin. He frowned, strode to the corner, stopped the homeless man from continuing to harm himself, and shouted loudly.

"See clearly, except for me, there is no one in front of you. Mu Haohong, how long are you going to pretend?"

The mere evil wind was not enough to shake his deep-rooted materialist thoughts for many years. He did not believe in ghosts and gods, and only believed that tramps pretended to be crazy to avoid interrogation.

After finally catching the clues to solve the case, he didn't want to give up.

After questioning him several times, the homeless man was still shaking like a sieve, huddled in the corner and refused to come out, crying and laughing, and kept shouting words like begging for mercy.

Wei Chongzheng rubbed his brows irritably, his proud patience almost exhausted.

Forget it, it's impossible to get something out of the other party's mouth, so you have to change direction.

While thinking about it, Wei Chongzheng recalled the notebook in the homeless man's arms, and taking advantage of the man's fear, he snatched the dirty notebook away.

When the homeless man saw something being taken away, he subconsciously wanted to take it back, but as soon as he raised his head, he screamed and shrank his head.

"I'm sorry, I'm sorry, I didn't mean it, I really didn't mean it, don't seek revenge from me, please, don't kill me, wuwu..."

He burst into tears and was clearly terrified.

It was as if there was something very scary and frightening standing in front of them. They couldn't see it, but the homeless man could see it, so they were so scared and crazy.

Shi Tian walked in bravely and leaned towards the captain's position.

"Captain, this seems to be a classmate book. My cousin also wrote a similar graduation message when she graduated from junior high school."

Shi Tian found that the closer he got to the captain, the more the frightening chill weakened, and he didn't feel so cold anymore.

He couldn't help but get closer and study the contents with his boss.

Classmate records are generally used when students graduate as a souvenir. They need to fill in basic information such as name, weight, hobbies, and graduation blessings.

Because a long time has passed, the paper has turned yellow, and the blurred writing on it has been blurred, but the strokes can barely be made out.

Shi Tian looked at the names in it, and they looked more and more familiar. He exclaimed: "Captain, aren't the names in this one the top students of the Noble Middle School?"

Wei Chongzheng hummed, flipping through the old notebook in his hand, and finally stopped at the page named 'Song Jiu'.

Song Jiu's personal information was recorded above, which was exactly the same as the collected information. There was nothing to focus on.

Therefore, the two people's eyes invariably focused on the graduation message.

'Time flies, and the future is bright. I wish Ah Lie to be on the gold medal list in the college entrance examination, and that no matter what he does, all his dreams will come true! '

Obviously, this classmate record was written by Song Jiu to Lu Lie.

The characters are like the characters, each stroke reveals its unique charm, timeless and elegant, with a bookish air.

Not only did the words use an intimate title, but there was also a simple drawing of a heart-to-heart at the end of the line. It seemed that the relationship between the two was indeed more than just ordinary friends.

But this only proves that the relationship between the two is extraordinary and does not provide any substantial clues to solve the case.

Wei Chongzheng scanned each page of records one by one.

Turned to the last page.

The name column is filled with the word 'Lu Lie'.

Different from other oxidized and yellowed papers, this A-4 paper had obviously been carefully preserved and packed in a separate plastic bag. The black writing on it was particularly clear.

The graduation message at the bottom contains a string of numbers similar to functional analytical expressions.

Complex and lengthy.

"Strange, why do you think of functional analytical expressions as graduation blessings for your classmates?" Shi Tian asked in confusion.

Normal people can write Chinese characters and offer blessings.

However, Lu Lie did the opposite and only wrote down a long and numerous functional analytical expressions.

Wei Chongzheng was also confused. He looked through the classmate records in his hand over and over again. After confirming that there were no new clues, he walked out with Shi Tian.

At this time, the indoor temperature has returned to normal.

Looking inside the house through the one-way mirror, the homeless man was still huddled in the corner, arms wrapped around himself, trembling all over.

The fat body shrunk into a hill, and from a distance, it looked like a trembling black sphere.

"Keep an eye on him and don't let him run out. When he returns to normal, try to communicate with him to see if you can get some information."

Wei Chongzheng ordered the staff, turned around and hurried to the technical department, and handed the long string of functional analytical expressions to the technician.

"This analytical formula looks familiar. I seem to have seen it somewhere before. Captain Wei, please wait a moment. I will import it into the computer and take a look." The technician turned on the computer and entered the analytical formula.

Use the mouse to adjust parameters slightly.

Then, we got a pattern shaped like a heart.

The technician suddenly slapped his head and shouted: "I'm just telling you why it looks so familiar. Isn't this a variation of the analytical expression of Descartes' cardioid function?"

"I didn't even notice at a glance which boss adapted it? It must have been hidden too deep."

Seeing the confusion on the faces of the two people beside him, he continued to explain.

"This analytical expression is called the romance of science students. It is generally used to express love to your sweetheart. It is a very famous and romantic way of expressing love."

"However, the adapted analytical formula is long and smelly, and several important parameters have been changed. Even I, who is proficient in mathematics, cannot see it at a glance. Can I make a successful confession?"

Using a mathematical function to express your love is already very tactful, but you also magically changed the important parameters. Is this because you are afraid that your sweetheart will see that you are expressing your love?

The technician sighed and shook his head, another failed pure love warrior.

When Wei Chongzheng heard this, his face immediately darkened, and he seemed to be in a bad mood.

In other words, Lu Lie used a function to express his feelings to Song Jiu on the classmate list, but it is still unclear whether it was successful or not.

However, there is a high probability of failure. Otherwise, how could Lu Lie choose to commit suicide by jumping off the building after his confession was successful?

There are only two possibilities for failure in confession.

First, the method was too subtle and euphemistic, and Song Jiu didn't notice it. Second, Song Jiu knew the meaning of this string of analytical expressions, but rejected the boy's love.

No matter which reason it was, it was more or less related to Lu Lie's death.

However, frustration in love was definitely not the main reason for his suicide. There must be some unknown factors behind it that crushed Lu Lie.

Which leads to tragedy.