Thinking of the props that mask the smell, the next task of the two is to determine which cleaning company the central bank employs, and what kind of cleaning agent this cleaning company uses.

The cleaning company is very easy to judge, their all-blue uniforms speak for themselves, Lex operated the keyboard next to him, and then said: "Luther Manor has also hired this company before, their full name is Metropolitan Snow Mountain Cleaning Co., Ltd., and it is also the largest cleaning company in Metropolis, with more than 1,800 employees......"

"Here, this is their information, I hacked into their internal database, retrieved their recent business information, according to this information, the central bank on March 18, ordered the cleaning service of the glass curtain wall."

Bruce came to the screen and looked at the information displayed on it, which showed that Metropolitan Center Bank had made an appointment to clean the glass curtain wall, and that 50 employees participated in this service, including 43 cleaners and cleaners, all of whom were men.

According to the message, they sent a total of three vehicles, each with four large kits, one of which contained all the detergents, but did not show the specific brand.

After checking their purchase order, Lex continued to operate on the computer screen, saying: "The raw material of the Pyro brand cleaner, the logo is a blue bear head, so it is also called the blue bear cleaner, and the Snow Mountain Company has been using this cleaner for more than ten years. ”

"The cleaner used for cleaning glass curtain walls is not finished, and I need to purchase the raw materials of the detergent and make it myself after I come back, and I am checking the specific information of their purchases......"

After operating the computer again, Lex said: "Their formula is secret, but the approximate chemical formula can be found, and judging from the ingredients, it must have a smell, but whether it can hide the smell of blood, I am not sure." ”

Bruce glanced at the ingredients on the screen and said, "These ingredients will definitely smell when they are combined, and the Wayne family has many chemical factories under their name, and some of them produce detergent raw materials, but if the bottle is well sealed, the smell will not be revealed." ”

"It's a good solution, if you make a little accident, let a few of the bottles break, and then let the smell stay on that truck, or simply sprinkle the detergent on a fabric like a mop or rag in advance, the smell will stay for a long time, put it in the same truck, and it can also be used as a mask when you carry it." Lex said.

Bruce glanced at him, and his eyes were probably "Why are you so skilled?" Lex replied with the color without hesitation, meaning "to each other".

The two watched all the surveillance videos again, and began to analyze which toolbox is the toolbox for hiding the body, once this toolbox is found, then the person who carries the toolbox can be locked, then he is very likely to be the murderer.

Among the eight large toolboxes, two of them are not sealed, and the contents are relatively small, and there are pictures of the contents of the boxes, so it can be ruled out, and the remaining six toolboxes are completely sealed, and they look exactly the same.

There are a lot of missing places in the monitoring in the central bank, half of the hall on the first floor is a dead corner, and what is even more terrifying is that there is no monitoring at the elevator on the first floor, that is to say, after this group of boxes was moved to the elevator, which box got on which elevator and where it went, it was completely impossible to tell.

Bruce and Lex discussed for 20 minutes, repeatedly calculated the boxes and routes, and finally could only lock the suspicious boxes within the range of three, and all three boxes were neither photographed in the handling scene nor the use scene.

Finally, when looking at the surveillance footage frame by frame, they finally found that there was a certain picture in one box that was different from the others.

Surveillance footage shows a cleaner pushing one of the boxes and walking down a hallway when he is suddenly stopped by a woman.

The surveillance footage can only photograph the feet of the two people and the bottom of the box, not their faces, nor their conversations, among them, the cleaner and the box are not abnormal, but the shoes on the woman's feet are different from those of the bank employee.

Lex found a promotional video of Central Bank on the Internet, where all the female employees were dressed in the same way, they were all wearing professional suits, even the shoes were the same, and the shoes in the picture were not gray round-toed heels like the bank clerks were wearing, but black pointed-toe heels.

With the style of this shoe, Lex found the brand of this shoe, which is a new product of Prada that season, the price is very high, and it needs to be booked in advance, that is, the ordinary female staff of the bank cannot afford to buy this pair of shoes, and those who can wear these shoes must be either rich or expensive.

Following this clue, Bruce and Lex deduced that this woman should not be a bank clerk, but the owner who came to handle business.

So, Lex began to inquire about the bank's large business that day, and then he found that since the end of February, the central bank has been following up on a large transaction, and the two parties to the transaction are Pyro Chemical Raw Material Production Co., Ltd. and Snow Mountain Cleaning Co., Ltd., of which Pyro Company has a large loan, which is personally approved by the president.

The cold light of the computer shone on Lex's face, turning the red hair on his forehead into a strange purple, and after looking at it intently for a long time, he straightened up, then looked at Bruce and said, "Now there is good news, and bad news." ”

"Let's start with the bad news." Bruce interrupted Lex.

"The good news is that I found out the identity of this woman, he is the owner of the Pyro company, and he came to the bank building today to negotiate business with the bank president."

"But the president has already been killed, so her business should not be negotiated." Bruce said, "She's supposed to have seen one of the toolboxes, and they've been talking for more than 30 seconds, if there's something unusual in that toolbox, she should be able to notice it, can she be reached now?" ”

"That's the bad news." Lex turned around, looked at the screen and said, "She's the second victim." ”

Lex turned around and pressed the button, and a picture appeared directly on the screen, which was a middle-aged woman with light makeup, but Bruce and Lex had both seen her on the news in another way, that is, she was cut open in the chest and abdomen, cut off her ears, and then plugged a signal receiver into her ears.

Bruce paused abruptly, then said, "The murderer is directing our gaze." ”

He turned around. Eye contact with Lex, both of them seeing the same message in each other's eyes.

"Professor Schiller said......" Lex began to pacing in place, and he said, "The real serial murderer will deliberately leave all kinds of clues to guide the investigator's gaze, so that the investigator will notice, what he wants the investigators to pay attention to......"

"What does he want us to pay attention to?" Bruce asked a question, but he wasn't asking, as it would be later. He asked himself: "The first victim is the bank president, the second victim is the owner of the Pyro company, and between the two of them, there is a business negotiation......

"What is this deal between the bank, the Pyro Company, and the Snow Mountain Company? And why did the murderer kill the leaders of both of them? Lex's eyes narrowed, and he asked, "What exactly is behind this deal that the killer is directing us to, so, should we focus on this part?" ”

"Professor Schiller also said that the murderer guides the investigator's attention, not without purpose, they often want to let the investigator discover his motives, and reveal some facts, which may be some grievances, or it may just be his tragic experience and hatred, or simply the murderer's understanding of something." Bruce said as he reminisced.

"In other words, there is a good chance that there is something else behind this deal?" Lex stopped pacing, stood still and began to think.

"Generally speaking, ordinary murderers will use all kinds of methods to erase clues, so that investigators try not to find themselves as much as possible."

"But the murderer of serial murder is just the opposite, they will deliberately leave all kinds of clues to guide the investigator's attention, so when investigating a serial murder case, following his guidance is not necessarily a bad thing, and it may allow us to discover his motive for killing." Bruce said, and with that, he turned and walked towards the door, saying as he went:

"I'm going to go to the bank, Snow Mountain, and Pyro to investigate and see if there is anything wrong with these three places, and you ......" Bruce paused at the door, and then said, "You continue to contact the police to get the information of the second case, and in addition, keep an eye on the owner of Snow Mountain, he is likely to be the third victim......"

With that, Bruce left, and Lex re-called up an interface that showed the results of the police investigation, and the only useful information in it was the timeline provided by the witnesses.

The last sightwitness to the bank president was the guard near the villa where he lived.

At 6 p.m. on April 2, the president of the bank drove his car back to his residence, his family was not in the city, so he lived alone, and never came out again, and on April 3, the body was found on the street in front of the bank gates.

There were no cameras near the street where the villa was located, and the patrol guards didn't provide any clues about the suspicious characters, and even the two nearby blocks didn't find anything suspicious, so the clue was broken, so Bruce and Lex focused on what was happening in the bank building.

Soon, Lex gets the timeline information about the second victim from the police, however, there is a very strange place in it.

According to police information, the last witness who saw the landlady said that he had seen her near the president's office on the 16th floor at 1 p.m. and that she had not been seen since.

However, the footage of the surveillance equipment that Lex and Bruce had just seen showed that at 1:10 p.m., the female boss was in a hallway and stopped the cleaner.

In other words, the cleaner who pushed the box was the last witness, and none of the cleaners' testimonies mentioned this.

In other words, Bruce and Lex's reasoning is likely to be correct, and the killer infiltrated the group of cleaners and killed the second victim on the spot after dumping the first victim.

Lex looked down at the information transmitted by the police, which showed that the body of the second victim was found on the street in front of the Pyro building.

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