Kang Yulong's body was still on the chair opposite the main entrance, facing the direction of the door, looking no different from the appearance of a tired person when he was taking a nap.

Cheng Min stood in front of the corpse, clasped his hands, and kept staring, looking very carefully, refusing to let go of even a small detail.

Luo Bei saw that the layout in the house was actually similar to where he lived, but it was a little bigger, divided into two bedrooms on the left and right, which should be where the Kang brothers and sisters lived.

Behind Kang Yulong was a long table with an incense burner, and the scabbard of a sword hung on the wall behind him, but there was no sword in it.

And about a zhang behind Kang Yulong, a sword fell to the ground.

Cheng Min squatted down, put his head under the chair where Kang Yulong was sitting, rubbed his hands on the ground, and then put his fingers to his nose and sniffed again.

Luo Bei really couldn't understand Cheng Min's way of investigating the case, so he could only sit on the chair on Kang Yulong's left.

Soon, Cheng Min got out of the chair and saw Luo Bei, who was already sitting down, with his eyes blinking, as if he was thinking about something.

Luo Bei was a little uncomfortable with him, and was about to get up, but was stopped by Cheng Min.

Cheng Min's hand touched his beard naturally, and he didn't even notice it, he thought for a while, and said to Luo Bei with a smile: "Don't move, you sit in this position very well......"

Then he walked behind Luo Bei and looked in the direction of Kang Yulong.

There was an "um" in his mouth, and then he quickly walked to the table behind Kang Yulong, grabbed some incense ashes from the incense burner with two fingers, twisted them, and sniffed them again.

"What did you find?" Luo Bei couldn't help but ask curiously.

Cheng Min rolled his eyes and said with a smile: "Before Kang Yulong died, there were three people in this room......

"Three people, could it be that there are other people besides their brother and sister?" Luo Bei said puzzled.

Cheng Min laughed a little mysteriously, and after a little contemplation, he said, "Yes, it must be like this......"

He walked up to Luo Bei, turned to look at Kang Yulong, and began to explain: "You see, although Kang Yulong's body is sitting upright on the chair, his body is slightly tilted to the right, indicating that he used to sit in this position facing you, so what does it mean?"

Luo Bei knew what he meant, so he said: "It could also be that his sister Kang Yu is sitting here, and the two of them are talking ...... the two of them."

Cheng Min shook his head and denied his hypothesis.

"It's possible what you said, but where do you look......" he gestured to the sword that had fallen to the ground behind Kang Yulong.

"That'...... It should be the sword I saw Kang Yu holding when he went out the night before......" Luo Bei looked at the long sword and remembered the scene that night.

Cheng Min nodded and said, "This is the most likely, but have you thought about it, why didn't that sword return to its scabbard, but fell to the ground?"

Luo Beidao: "Maybe it fell to the ground......"

"It shouldn't be an accident, if Kang Yu is sitting here with you, then she didn't put her sword back in the sheath, she should put it by her side, don't you say?"

"It's also possible that Kang Yulong ......," Luo Bei was still a little unconvinced.

Cheng Min looked at Luo Bei with a smile and said: "That's even more impossible, Kang Yulong's body is extremely poisonous with a red fire scorpion, and his body is so weak that he is not even as good as an ordinary person, how could he hold a sword for no reason, what's more, you see where the sword fell, at least a zhang away from him, there is only one explanation for this, that is, there was originally a person standing behind him......"

"So, I deduce that there were once three people here, it should be that after you saw Kang Yu, she returned to the house with the sword, and before she could put the sword back in the sheath, that person appeared in the house, that is, sitting in your current position, and Kang Yu was standing behind Kang Yulong......"

"But...... Why is Kang Yulong's death so strange, there is no trace of struggle or fighting, if Kang Yulong has no power to restrain the chicken, but Kang Yu is holding a sword in his hand, why is there not even a trace of his hands...... Why is that?" Cheng Min began to talk to himself, although he figured out that there was a third person in the room, there were still many mysteries that had not been solved.

"Kang Yu...... How could Kang Yu disappear without explanation?"

"No, it's not unclear...... It's that the third person robbed Kang Yu while killing Kang Yulong, or that his original purpose was not Kang Yulong, but Kang Yu, so it makes sense, Kang Yu disappeared, and Kang Yulong just died indirectly......"

"That's not right, haven't you checked Kang Yulong's body without any scars, he doesn't even have the slightest intention of struggling, it's like he sleeps normally" Luo Bei listened to him analyze the case where he was talking to himself, and said suddenly.

Cheng Min paced back and forth, then walked in front of Luo Bei, leaned down and put his hands on the chair where Luo Bei was sitting, and then leaned his face over and said: " You know that there are many ways to kill people in this world, some are with blunt weapons such as axes and the like, most of them are with a bit of brute force but mostly done by stupid people, and there are also many masters in the rivers and lakes, with knives and swords, and some strange weapons, they kill people very quickly, sometimes even the blood does not flow out of the wound People have already died, but these have one thing in common, that is, they will leave wounds, even if they are subtle......"

"Of course, there are also people with advanced cultivation who can urge internal forces to kill people, but it is impossible to die like Kang Yulong......"

"What does it mean that he closes his eyes as if a man who has been weary for a long time can finally get a good night's sleep, and his expression is serene?"

"Now our analysis is based on the fact that Kang Yulong was killed, so if Kang Yulong only died by himself, then everything will not be true, so whether he was killed or ......"

The analysis of the case goes to the most critical and difficult part, and if the answer to this question is not found, then all inferences will be overturned.

He knew that Luo Bei couldn't give him an answer, and he never expected Luo Bei, so he walked to the table in a few steps, grabbed a small handful of incense ashes in the incense burner, checked it again, and then squatted down again, and touched the ground under Kang Yulong's body for a long time.

The impression of this person is becoming more and more unclear, and when we first met, it was he who had just walked out of this room, with a smile on his face and a deep bottomless light in his eyes.

His thinking is very jumpy and sharp, and Luo Bei always feels that his eyes can see things that others can't.

And at this moment, he was like a big child excitedly burrowing under a dead body, could he find the answer he wanted on the ground?

Cheng Min got up from the ground, his hands were covered with dust, but he was not in a hurry to remove the dirty dust, but was quite excited, and he also rubbed it very carefully, and from time to time put it in front of his nose and sniffed it carefully.

Finally, as if he had figured out something, he walked back to Luobei and stretched out both hands in front of Luobei's eyes at the same time.

"What do you see the difference between these two types of incense ash?"

Luo Bei raised his head and looked at him, and then put his eyes on his two hands, his left and right hands were stained with powdery dust, which was not much different from any incense ash, if you looked at it alone, you wouldn't find anything unusual at all, but when the two were put together, they would show subtle differences.

"They seem to be a little different in color......

Cheng Min said with a smile: "Yes, their colors are different, one is the gray-brown of normal fragrant ash, and the other is a very special gray-white, the difference is that one is a little more brown, the other is a little more white, if you look at one alone, it is difficult to see the difference, but when the two are put together, the difference will be easy to see......

Luo Bei nodded yes: "But even if these two kinds of incense ash are different, can this explain the cause of Kang Yulong's death?"

Cheng Min pondered for a long time, and then his expression became a little solemn.

"Although there are many different incense ashes in this world, their uses are no more than that, but most people may not know that there was once a kind of incense in this world that could invisibly kill people......"

Luo Bei didn't interrupt him, but he still paused, and seemed to be hesitant to say what he said next.

He let out a long sigh, his expression became very gloomy, Luo Bei had never seen him so nervous.

"As I said, after all these years of working in this business, there is only one case that I have not found the truth, and it is also a scar that has been hidden in my heart all these years......"

"That family died a terrible death, a fire burned all night, all turned into a white field, and none of the dozens of members of the family, old and young, survived......"

"Then what is the final truth?" Luo Bei asked with a trembling heart.

"The truth?"

Cheng Min shook his head with a miserable smile and said: "If the truth of everything can be found, then there will not be so many tragedies in this world, at least it can give the deceased a little comfort...... To say that casualties in a fire are inevitable, but dozens of family members, all buried in the fire, this is very abnormal, this incident even alarmed the government and the opposition at that time, but the sudden Kaifeng tragedy made everything shelved, and the truth was buried...... I never came back to that city after I walked out of that gate for the second time, and then I came here and lived as a little catcher of the alien race......"

"That time I walked through every room and found a strange incense in a piece of rubble, it shouldn't have appeared in that place, because once it was lit, it was enough to make people with strong martial arts lose their ability to resist, if it was an ordinary person, I am afraid that the medicinal power would be more violent, which reminded me of ......"

He closed his eyes, as if returning to that painful memory, and then said with some struggle: "And that strange incense was originally a secret on the rivers and lakes, and it had never appeared again even more than a hundred years ago, and its name was ...... Agarwood ......"

Luo Bei said softly: "Bone agarwood ......"

The name seems strange.

"The reason why this incense is gray-white is because its main ingredient is an animal bone from a bitter cold land, and with this bone ground into powder, mixed into it, it can make people completely fall into anesthesia, even if the cultivation is high, it is difficult to be spared, so the incense ash left behind will show a distinctive gray-white ......."

"It is said that it was specially developed by a certain great sect in order to deal with a big devil in the rivers and lakes, so that he temporarily lost his martial arts, and that sect is now also a well-known righteous sect, so no one has used this incense since the big devil was ambushed, but I didn't expect it to appear again now......"

Cheng Min's eyes became deep and hollow, and his hands unconsciously began to rub the two mustaches, even harder than every time, Luo Bei knew that he was still immersed in the incident back then, and it seemed that he was not just as relaxed and free as he looked.

People may have some past events left in their hearts, and after a long time, they thought that they would gradually fade, but in fact, they were just deposited deeper......

"Why does it reappear?"

Cheng Min asked in his heart, maybe even he himself would find out, as long as he was nervous, he would unconsciously touch those two beards.

Luo Bei was so amused by him that he almost laughed, it turned out that he had incense ash on his fingers, and he didn't think much about it and touched his beard again, and as a result, he turned his two mustaches into white beards.

Cheng Min didn't know why Luo Bei suddenly laughed funny, and when he saw the incense ash in his hand, he suddenly thought of it, and couldn't help laughing.

......

......