After seeing Lin Bayi's shocked expression again, I strongly felt that this time, my intuition was right again, there must be something wrong with the red room on the second floor of the villa, and in that villa at that time, in addition to me and Lin Bayi, there must have been a third person staying in it!

"Room? Could it be the room on the second floor that you didn't let Xiaoxue and me into since I was a child? Lin Feng's quick reaction came quickly, and he said to Lin Bayi with a surprised expression.

"Xiaofeng... You take Xiaoxue, let's go out first... ”

"Are you still unwilling to tell us the truth?" Lin Feng looked a little excited, and struggled several times to get up from the wheelchair, but there were thick plaster blocks on his hands and legs, and in the end he still couldn't stand up.

"You guys go quickly, I'm here for your good, just listen to Dad's last words, promise me, take care of your sister!"

Niu Pengyu and two other police officers walked into the conference room, forcibly took Lin Feng and Lin Xiaoxue away, and after closing the door, only me and Lin Bayi were left in the huge conference room.

He took another puff of his pipe, still in the same light and breezy manner.

"Really, the psychological quality of the police is getting worse and worse now, can you use such a big deal to deal with a bad old man like me." As he spoke, Lin Bayi glanced at the roof of the house opposite, revealing a helpless expression.

It turned out that he had already noticed the sniper lying outside the house, and the reason why he invited most of the people out of the house along with Lin Feng and Xiaoxue should be to protect their safety.

If he was really a perverted murderer, he shouldn't have deliberately noticed the safety of other people like this, Lin Bayi, how many secrets are hidden in you? What does that weirdo in red have to do with you!

"Now that those people have gone out, we can sit down and have a good talk, to be honest, I was like talking to you when I was in the villa that day, but I never had a chance!" During the conversation, Lin Bayi took the cigarette butt and walked back to his position to sit down again.

It was the most relaxed moment he had ever felt since he entered the conference room, and it seemed that he was really relieved and not ready to do anything about his death throes.

I took the opportunity to bring a chair from outside the house, sat down in front of him, and then took a cigarette out of my pocket and took a slow puff.

Although Lin Bayi has confessed, I know that my mission has not been completed, and I must do my best to get more clues from his mouth, because this man has the truth I have always wanted to know!

"I think that what I do is not leaky, it is all Chang Qingshan's fool who broke me.

Originally, I didn't plan to kill him, I wanted him to leave Z City after writing the original manuscript, but the guy actually said that those three manuscripts were the only masterpieces in his life, and he wanted to take the manuscript from me, so I chose to kill him in desperation. ”

Indeed, if it weren't for Chang Qingshan's appearance in the office building that night, I wouldn't have investigated you step by step through him!

"And that pianist, did you kill him out of desperation?"

"No way, who let him not escape from the hall according to the predetermined plan. I knew that once he fell into the hands of the police, the whole incident would be exposed, so I took advantage of the chaos to kill him. ”

"So, how did you kill the pianist? The medical examiner came to the conclusion that the embolism of the left atrium caused the myocardial infarction, but the pianist has no history of heart disease, so you must have caused his heart attack in some way! ”

"Haha, I didn't expect that in this case, there are still things that you Gao Fei Detective can't understand!" Lin Bayi really shuddered in front of me, but I didn't seem to care.

Anyway, now that the overall situation has been decided, even if he humiliates me fiercely now, I just don't feel pain.

I don't have any good qualities as a person, but I have a thick skin and a good mentality.

"It's actually easy to create an embolism near the human heart, I don't know if you've ever heard of something called an air needle."

Air Needle! When I heard these three words, I almost instantly understood how Lin Bayi killed the pianist.

In this way, the purple-black dots that appeared near the pianist's back in the autopsy at that time can be explained.

Lin Bayi must have taken advantage of the pianist's inattention to inject a large amount of air into a vein near his left atrium through gas injection, thus causing the pianist to die of myocardial infarction.

Intravenous air injections have always been a terrible means of lethality, and the principle is simple.

Because air enters the blood vessels, it can indeed cause gas embolism, but it depends on the amount of gas entered. If the amount of air is small, it can be dispersed into the alveolar capillaries and bind to hemoglobin. or diffuse into the alveoli and excrete with respiration without causing damage.

However, if the amount of air entering is large and relatively rapid, due to the beating of the heart, the air and the blood in the heart chambers are stirred to form a large amount of foam, and when the heart is contracted, it is not expelled or the pulmonary artery is blocked, which can lead to sudden death.

Scientists have used this method to kill smaller animals, such as rats and rabbits in the lab, but this is the first time I've heard of a human being killed by an air needle.

First of all, the technique itself is not sophisticated, and secondly, the injection process is very difficult to control.

The site of injection must be the main vein, not the superficial vein. The air embolism allows it to reach the heart before it is dissolved and absorbed by the blood.

The lethal amount of air is about 50 milliliters, and it should be pushed in quickly at one time in order to form a large air embolism.

All of the above characteristics must be met in order to form an embolism near the human atria and cause death. If any of these links are deviated, the internal circulatory system of the human body will synthesize the air in the veins in a short period of time, although the air will still cause some harm to the human body, but it is not fatal.

At that time, the pianist was seriously injured by Lin Feng, and it was unlikely that he would struggle in that situation, so Lin Bayi wanted to inject all the air into his body at once, but it would work.

But to be honest, in that situation, it was quite difficult for even a doctor with many years of experience to kill a pianist with an air needle in one go.

First of all, the dose of the air needle is difficult to control, and secondly, the pianist was wearing clothes at that time, so Lin Bayi could only judge the location of the pianist's veins by feeling.

Let's take the hanging bottle as an example, some nurses can prick the needle crookedly even if they look at the blood vessel distribution on the back of the hand for a long time, but Lin Bayi judged the correct position with a needle in that case, which shows that his ability is not ordinary, not to mention that he is over seventy years old, this alone makes me sincerely admire the thin little old man in front of me.

However, when talking about killing, Lin Bayi's expression was calm and terrifying, as if he was just talking about a prosaic thing, and I could see that this guy didn't have much feeling about death in his bones.

Lin Bayi glanced at the situation outside the window, then took a puff of his pipe, and continued to speak slowly: "Since I answered you a question, out of etiquette, should you also pay me a salute?" ”

"What do you want to know?" Lin Bayi's appearance looks a little strange, but I haven't figured out what's wrong for the time being, but I just vaguely feel that he seems to be deliberately delaying time?

"Except for Chang Qingshan, I think I'm still doing a good job, so when did you start doubting me?"

When did you start to doubt you? To be able to catch this old fox, I still have to thank Lin Xiaoxue from the bottom of my heart.

As I spoke, I slowly took out the brass pocket watch that Lin Xiaoxue handed me at the beginning, and then put it on the table in front of me.

After opening the brass pocket watch, the photo that appeared inside was a group photo of their family of four.

"It was given to you by Xiaoxue, right?"

"Yes!"

Lin Bayi looked at me and asked with a puzzled expression: "With this pocket watch alone, why can you suspect my head?" ”