No trace of espionage

Wan Lilang was startled, and suddenly understood: "Mr. Lin, did you think of it because the keyhole is black?"

"Alas!" Lin Chuang sighed and said, "Success or failure depends on the details.

I was also confused earlier, and my train of thought was always on a few major investigation directions, and I never thought about the blackening of the keyhole.

I also visited this kitchen this morning and found nothing wrong.

But just now, when I saw a pack of matches on the east window sill, I suddenly felt something was wrong.

why?

Because the ignition point of the white phosphorus on the match head is very low, it is understandable to expose it to the sun for a long time. If it is exposed to the sun for a long time, it is easy to spontaneously ignite, especially at noon when the sun is at its fullest.

This is common sense in life, we all know it, Wu Zhongcheng is a careful person, look at the well-organized yard he tidied up, and the kitchen is also clean and tidy.

Such a delicate person, wouldn't he not think of taking the matches to a cool place aside at noon?Director Wan, why do you think this is? "

Wan Lilang thought for a while and said, "The kitchen is the Westinghouse. When the sun is at its fullest, the window sills are no longer in the sun, and the possibility of spontaneous combustion is reduced. Is that so?"

"Yes and no." Lin Chuang shook his head, and said: "As long as the matches are dried, it doesn't need the sun to be the most poisonous, and there is a possibility of spontaneous combustion.

In other words, it is not safe to put it on the windowsill for a long time, and Wu Zhongcheng must know this.

The reason why he didn't take it away, I think, is because he left in such a hurry that he didn't have time to think about this detail. "

Speaking of this, Lin Chuang glanced at Li Shiqun meaningfully: "He must have been arranged to go away."

Li Shiqun said: "Yes, I let them go, I don't want you to disrupt my plan."

Lin Chuang smiled, but continued to discuss the case with Wan Lilang: "Also, the reason why this pack of matches didn't spontaneously ignite is because it hasn't been in the sun for a few days, that is to say, it is very likely that it was only in the sun yesterday morning. .”

Wan Lilang nodded and said: "Yes, I agree. If it takes a long time, it may have spontaneously ignited."

"Yes. I thought about this question, and then thought, why did he expose this pack of matches? Could it be related to the assassination of Tian Chuncai?
As soon as this idea came to me, I suddenly thought of the fact that the keyhole is black.

Yes, isn't the black stain on the keyhole just like being blackened?

Thinking of this, it is not difficult to deduce the following.

A single match won't burn the lock and make a black stain that deep, but what about the matchheads of many matches?Put the white phosphorus on the matchhead into the keyhole, and use the airtightness of the space in the lock. If it is ignited, what is the difference from a small explosion?Can the impact of this small explosion break the lock? "

Speaking of this, Wan Lilang completely understood, and looked at Lin Chuang with incomparable admiration, and said: "Chief Lin's eyes are burning like a torch, his mind is turning like lightning, he is very accessible, and his humble job is completely convincing!"

"Director Lin, you just did a scientific experiment, right? It can only prove that this is a way to unlock the lock. How can you prove that Wu Zhongcheng is the murderer?" Li Shiqun asked with a sullen face.

"Director Wan, where is the matchstick I gave you just now? Show it to Deputy Director Li," Lin Chuang said.

Wan Lilang handed the match to Li Shiqun, and Li Shiqun understood it at a glance.

The matchstick had no trace of burning or blackening, just like the matchstick after Wan Lilang scraped off the white phosphorus just now.

"Who knows..." Li Shiqun shut his mouth as soon as the three words came out.

What he wants to say is: "Who knows if you have prepared it long ago?"

But it suddenly occurred to him that Lin Chuang had picked up the match stick under the noses of everyone, and he didn't keep it in his own hands, so he gave it to Wan Lilang for safekeeping.

It turned out that at that time he thought of avoiding suspicion.

He shut up, but Lin Chuang continued to speak.

"We can imagine such a picture. When Wu Zhongcheng scraped enough white phosphorus on the matchstick, he threw the matchstick into the stove hole. As long as he burned it while cooking, the traces were erased. However, Because there are many and thin matchsticks, one accidentally fell into the miscellaneous firewood and garbage pile.

Maybe I didn't look carefully for any omissions, maybe in his opinion, even one or two omissions are not enough to reveal, so I was lucky to find such a one in the garbage. "

The reasoning is reasonable and seamless, and everyone feels that there is no problem.

But Li Shiqun was different. He always felt that Lin Chuang's inference and conviction were a bit mysterious, and there was not enough evidence.

What happened to a matchstick that didn't burn?Maybe there happened to be such a defective product, Wu Zhongcheng discovered it while cooking, and just threw it away, how could it become criminal evidence?

So, he shook his head and said: "The inference is reasonable, but the evidence is insufficient. Director Lin, it is a bit far-fetched to conclude that Wu Zhongcheng is a murderer with such a matchstick."

Lin Chuang was not angry, but nodded, and said: "Deputy Director Li is too right. It is indeed a bit far-fetched."

Then, he looked straight at Li Shiqun and said, "Deputy Director Li, assuming that my inference just now is true and that Wu Zhongcheng opened the lock with white phosphorus, then you heard it just now. Big, but at two or three o'clock at night, Chen Yifei and Hu Yafu would definitely be awakened, and even Liu San on the first floor might hear it.

Then, if these three people are not allowed to faint, his whereabouts will be exposed immediately, and the next murder will be out of the question. "

Li Shiqun's eyes lit up, and he said: "Yes, then how did he make Jean faint?"

"It's simple."

After Lin Chuang finished speaking, he walked into the kitchen, motioned for Li Shiqun and Wan Lilang to follow, pointed to the jar of vinegar and the jar of soda noodles, and said, "Here is the murder case?"

Li Shiqun and Wan Lilang looked at each other, and laughed with a sneer: "What kind of evidence is this? Could it be that Wu Zhongcheng would use vinegar to stun people? Director Lin, this is too much, isn't it?"

Wan Lilang also looked puzzled.

Lin Chuang smiled and asked, "Deputy Director Li, where is Wu Zhizhong's home?"

"Peking."

"That's right. Wu Zhongcheng said that he was from the same hometown as him. They are all from Peking, not from Shanxi. As far as I know, Peking people are jealous, but not very jealous. For Peking people, vinegar is just a condiment. The dishes need to be decorated with some vinegar. It is not the main condiment, and it is much worse than the amount of soy sauce.

So, what did Wu Zhizhong do with such a big jar of vinegar?I have never heard that vinegar can pickle pickles, nor that vinegar is a scarce commodity that needs to be hoarded. "

Wan Lilang opened the vinegar jar and looked, even if it could pickle pickles, there was no vegetables in it.

Yeah, why?

There is such a large jar of vinegar in the kitchen. It seems nothing at first glance, but after careful consideration, it is indeed very abrupt.