The shopkeeper shook his head: "No, no one is so powerful, and you can tell which printer printed it by a printed word on the paper." Pen ~ Fun ~ Pavilion www.biquge.info"

Chi Ming was a little disappointed and asked, "Then what do you mean?" ”

The owner explains, "I mean, an expert can tell how many needles a printer has. ”

Chi Ming was even more disappointed and said: "What's the use of that, there are still a lot of printers that can judge a few stitches." ”

The shopkeeper showed a smug look, as if he had met a studious apprentice, he said: "It is very useful, the dot matrix printer is different from other printers, the needle is easy to damage, you think, there are more 24-needle printers on the market now, a print head has 24 needles, and the probability of breaking the needle is very large." ”

When Chi Ming heard the word "broken needle", he remembered the intermittent lines of the fingerprints he usually saw, if the printer has a broken needle, then, the handwriting printed with a broken needle must be different, on the other hand, if there is a broken needle, you can reverse the corresponding printer.

He suddenly thought that he had studied these complicated printers from scratch, and it was better to ask this master to see if the note left by the murderer would have any broken needles.

Chi Ming pulled the shopkeeper into a small workshop next to him and said, "That's right, I have a case at hand, and there is a note on the case, on which a line of words is printed with a dot matrix printer, I want you to do a favor and see if you can see if the printer has any characteristics?" ”

The shopkeeper saw that Chi Ming was mysterious, so he lowered his voice and said, "Okay, you didn't say it earlier, I can help with this favor." ”

Chi Ming took out the piece of paper from his briefcase and said, "However, you have to promise me that this is a confidential case, and you must keep it confidential." ”

The shopkeeper's eyes were fixed on the note in Chi Ming's hand, as if he couldn't wait to see what was printed on the note, he said: "I know this, the police are handling the case, I am just helping from the side, I will definitely keep it secret." ”

Chi Ming opened the note, the shopkeeper stretched his neck long, and he finally saw the line on the note: "003, let all the evil creators end!" ”

Chi Ming pointed to the line of words and said, "Look, it's this line of words, see if you can see what the Tao is." ”

The shopkeeper took the piece of paper, looked at it carefully for a while, and said, "I see that this printer does have broken needles, not only broken needles, but also broken needle compensation." ”

Chi Ming looked puzzled, he found that there were really many doorways for this needle printer, so he asked, "What is broken needle compensation?" ”

The shopkeeper is even more proud, it is estimated that he never dreamed that he had repaired the printer for half his life, and there were even police officers to ask him for advice, he patiently explained: "This is an advanced technology, tell you directly, your paper of this printer is printed by a 24-needle printer, the 9th needle is broken, if you do not compensate for the printing, then the 9th needle printing area will leave blank, which is obvious, but this printer has a broken needle compensation function, the compensation is the 8th needle, That is, the 8th needle was reprinted a second time, covering the blank area of the 9th needle. ”

Chi Ming didn't understand and asked, "Since the blank area has been covered, how can you see it?" ”

The shopkeeper handed Chi Ming a cigarette, Chi Ming waved his hand, indicating that he would not smoke, and he anxiously waited for the shopkeeper's explanation.

The shopkeeper lit a cigarette himself, took a puff, and said, "The compensation print is a second print, and it is impossible to exactly coincide with the part that has already been printed in the first pass." It depends on experience, like us who repair printers, if we don't have such a little housekeeping skills, this business really can't be rectified. ”

Chi Ming finally understood a little, he understood, the broken needle compensation is to print the broken needle twice, and the good needle will fill the blank left by the broken needle, so an experienced master like the shopkeeper can see it at a glance.

He suddenly thought in his heart, 24 needles are broken at random, and the other 23 needles have a chance to compensate, the probability of this combination is 552 kinds, although the probability is not very large, but it is very enough to exclude printers.

He happily said to the shopkeeper, "Thank you very much, you have solved a big problem for us." ”

The shopkeeper leaned his ass against a workbench, flicked the ash into the ashtray, and said, "Insect carving, if you need help, just say it." ”

Chi Ming hurriedly answered: "I really need help, if we encounter a printer that needs to be identified during our investigation in the future, we will move it over, you can help us." ”

The shopkeeper waved his hand and said, "No problem, no problem, just take it." ”

After Chi Ming obtained important identification data on the shopkeeper's side, he left the printer repair shop with confidence, he knew that this time he finally had a little grip on his hand, if Wulong searched for any printer, he could send it to the shopkeeper to see the combination of the printer's broken needle and broken needle compensation, if it does not match, it can be ruled out, if the combination is the same, it can be used as a key object to focus on the investigation.

Chi Ming drove all the way to the criminal department, he didn't call Murong Fei, he wanted to wait until he got down to the criminal department, and then report to Murong Fei, so as to give him a surprise.

Unexpectedly, it was Murong Fei who called first, he thought that Murong Fei was in a hurry, and called to ask about the situation, but as a result, he didn't expect Murong Fei to say: "Chi Ming, you come back quickly, something is wrong again." ”

Chi Ming was nervous for a while and asked, "Murong, what's going on?" ”

Murong Fei said anxiously: "It should still be this murderer, he actually put the details of our case online." ”

"Really?"

"It should be the murderer, otherwise no one knows the phrase 'let all the Evildoers end', he posted this sentence on Weibo, Weibo is called 'The Terminator of the Evildoers', and there is a picture attached below, which is a picture of the big wound on Dai Wenshang's neck, if it weren't for the murderer, it would be impossible to have this picture. Now this Weibo has been forwarded thousands of times, and the number of retweets is growing dramatically, I have reported to Director Ba Fei, and Director Ba Fei asked you to come back immediately and determine the location of the Weibo blogger. ”

"Well, I have mastered these techniques well, as long as the relevant departments can cooperate with the work, I believe I can still handle it."

"Alright, we'll wait for you."

Chi Ming hung up the phone, thinking to himself, this case is indeed escalating, the murderer has become a little arrogant, seeing that the police did not move, he broke the news on the Internet, it seems that the murderer really wants to win the public's attention.