Shen Ling immediately asked: "What important discovery?"

I smiled and said, "I'll show up soon. I'll wait for you to come over."

"Okay." After Shen Ling heard my good news, she immediately agreed.

Without any time to explain, He Xiaofei and I immediately went to the convenience supermarket downstairs, bought some white vinegar, and then waited peacefully for the arrival of Shen Ling and Peng Xin.

Soon, the two of them arrived as promised. As soon as they entered the door, Shen Ling asked: "Xiao Huan, what important discovery have you made? It's so mysterious."

He Xiaofei said with a smile: "Why did you bring our Peng Xin? The old driver will be driving tonight. It is not suitable for children."

"Get lost." I said to He Xiaofei with a smile, and then I started to introduce what steamed vinegar tracing is.

As the name suggests, steamed vinegar tracing actually uses the characteristics of white vinegar. It can be said that the traces of human sweat that have appeared on glass and other special vessels are reappeared. As for the principle, I really don’t know. It’s probably The principle of neutralizing the weak acidity of white vinegar and the weak alkalinity of sweat.

"Have you watched "Detective Chinatown"? Do you still remember the fingerprint in the first part? It is very likely that the suspect's fingerprint was left here. Get ready to work, Xiaofei." I said with a smile.

"Okay, veteran driver." He Xiaofei responded to me with a smile.

After I took the white vinegar from He Xiaofei, I immediately poured it on the prepared plate. Under it was a stove commonly used for heating in rural areas, but the fuel was replaced by alcohol blocks instead of coal. Soon, the pungent smell of white vinegar filled the entire room.

But after lighting it, to be honest, I would rather smell those rotting corpses than smell the evaporated white vinegar. It is so smoky, and it is really a vomiting artifact.

Fortunately, the records in "The Secret Technique of Chasing the Shadow" are relatively reliable. After being steamed with white vinegar, three obvious fingerprints immediately appeared on the glass. Two were relatively small, and the other was larger. There was nothing wrong with it. There is no doubt that the two relatively small fingerprints should have been left by Lan Qi, and the larger one should undoubtedly be the murderer.

"It's really not suitable for children. Brother Xiaohuan, Xiaofei, you two are really bad." After the fingerprints appeared, Peng Xin immediately understood what He Xiaofei and I meant before, and said awkwardly.

"I'm just saying, sister Ling'er, you two shouldn't have come, it's all Lu Huan's fault." He Xiaofei immediately put all the responsibilities on me.

"Shut up." Shen Ling said helplessly, "Peng Xin, collect your fingerprints and handprints immediately. I'll ask Lao Wang to bring someone over."

"No need, this room has no value for further inspection. By the way, Ling'er, do you think this rice paper is also a jade version?" I handed the rice paper to Shen Ling. Shen Ling looked at it and said affirmatively. : "That's right, these are three-layer jade-printed xuanxuan. They are very expensive and my father is reluctant to use them when he practices calligraphy on a daily basis."

"Then this murderer is quite rich." He Xiaofei said jokingly after hearing what Shen Ling said.

"That's not necessarily true. I think if you were just a rich man, you wouldn't be so generous. I just found out the price of this jade edition. One of these is more than 300. There are nearly a thousand of them, more than 30 "What?" I said suspiciously, "I think the murderer of this serial rape and murder case is very likely to be someone who has easy access to Yubanxuan."

"Is he the boss of the rice paper factory?" Shen Ling asked.

"No, how could the boss give away such expensive rice paper at will? If these four victims had so much, it would be more than 1 million. The boss of the rice paper factory may not be so generous." I said.

After that, I continued: "I think there is a possibility, and that is the teacher who teaches calligraphy classes."

He Xiaofei immediately disagreed with my point of view and said: "It's impossible for an ordinary calligraphy class teacher to be so willing to kill someone."

After hearing He Xiaofei's words, Shen Ling and Peng Xin also nodded in agreement, but I shook my head and said: "Do you think a big boss who can easily earn millions would come to a place like this? It just doesn’t make sense rationally.”

Shen Ling also agreed and said: "This is indeed a suspicious point. At least most of my father's lecherous friends would not do this. But why do you suspect the teacher who teaches calligraphy classes?"

Seeing that Shen Ling didn't understand at all, I immediately explained: "When I was reading the newspaper in the office this afternoon, I found a class like this, which specializes in teaching pregnant women, such as prenatal education classes, and the price is already A class costs 5,000 yuan, which many wealthy matriarchs will not care about."

"Well, Lu Huan, you are right. Indeed, many matriarchs have this attitude towards spending money on their children. As long as they treat their children well, they don't care how much they spend." Shen Ling also understood what I meant, " You mean, this murderer is most likely a teacher who teaches calligraphy to pregnant women?"

"Yes, but why should we teach calligraphy to pregnant women? I don't understand this." I expressed the last doubt in my mind.

"It's simple. Many pregnant women have bad tempers during pregnancy, and practicing calligraphy can make them calm down." Shen Ling said with a smile: "Look at my father, who was born as a soldier. He also had a very hot temper. Now I am studying antiques and calligraphy, and I am much quieter."

After hearing what Shen Ling said, I immediately understood and started to draw a portrait of the murderer and said: "First of all, the murderer is an elderly man about 175cm, or a middle-aged impotent man. His appearance should be of the handsome type. For people who are pregnant for the first time, there should be a class specifically for pregnant women, which has recently appeared in the hospital."

"Why are you in the hospital?" He Xiaofei asked puzzledly.

"It's very simple, the murderer told me." I pointed to the fingerprints on the glass and said, "Look at this fingerprint, there is obviously a piece missing on the middle finger, but the fingertip is still there, which means it is not a severed finger."

Shen Ling followed what I pointed at and looked at it for a while, then continued what I said: "It's the mark of the wound bandage."

"That's right, such a big gap doesn't look like it's been bandaged with a band-aid, so it must be bandaged with gauze like those in the hospital." I said with a smile.

He Xiaofei asked in confusion: "Why didn't he bandage it himself?"
Chapter completed!