When I clicked on the email, it was another unsigned HQ email, with only one sentence, 'Once you start the investigation, please always pay attention to your own safety, because you will face not only the Assassins of the Ozu Crossbow, but also the internal investigation, once the investigation begins, you will be eligible for promotion, good luck'.

Seeing this email, David Maslow sat in the boss's chair and pondered, it was impossible for him to give up the investigation with the philosophy of his life, but these two emails that I don't know who sent them knew that things were dangerous.

He was not a flurry boy, and he knew what some cases would face once they started to investigate, so after thinking for a long time, he picked up the phone and called one of his subordinates.

"Mika, come to me".

Hanging up the phone, David Maslow clicked on the printer on the computer, took a file bag, put the printed documents related to the Ozu crossbow case into the file bag, and put them on the desk.

A few minutes later, a black girl knocked on the door and walked into David Maslow's office, "Head, you look for me".

"Hmm", David Maslow pretended to be inadvertent, glancing at the file bag on the desk, and then covered it with other documents, "How's the case in your hand handled".

"It was done yesterday, do you have a new case for me?" Maslow's actions unexpectedly aroused Mika's curiosity.

"So fast?"

"Of course, isn't it just a few cases of theft? It's not difficult," Mika smiled and said, "Head, it's been two years since I was transferred, can't you give me some challenging cases?"

Maslow shook his head, "You are a woman, I can't give you some cases, lest you can't eat in the future, and when I will, I have a few difficult cases in my hands, so I should give you a test."

After saying that, Maslow got up and walked to the archive room in the middle of the office, and Mika saw Maslow enter the archive room and immediately picked up the file bag on the desk, opened it, and was attracted by the document in his hand.

Watching the time pass unconsciously, Maslow, who was standing at the door of the archive room, wanted to come out several times, but saw that Mika was completely immersed in the file, and after five or six minutes, Maslow was afraid that Mika would doubt how it might take so long for him to get a file afterwards, and then doubt his motives, so he could only cough and walk out.

"I'm sorry, head", Mika saw Maslow looking at her with a helpless face, and hurriedly changed the subject, "Head, are all the cases in this case true?"

"What do you think?" Maslow said in a deliberately mocking tone, "Ninja, hell, it's the 21st century, how can there be ninjas, okay, you don't care about this, this is the file will be handed over to me as soon as it is processed."

Mika nodded, took the file bag, "Okay, head, I'll deal with it", turned around and walked a few steps, Mika turned back and pointed to the documents on the table and said to Maslow, "Head, since you're not interested in investigating the case of the Aozu crossbow, how about giving it to me?"

"It's not good, this kind of headless case, even if it is investigated, it will be investigated in vain, and many of them are from other countries, rather than wasting time, it is better to help me deal with a few more cases in New York."

"I'll just take a look at it, and promise not to delay the task you gave me", Mika flattered, "Head, you should let me increase my knowledge."

Maslow knew that Mika would be curious, but he pretended to be helpless on his face, "Okay, remind you again, don't delay the case at hand."

"Understood, head", Mika picked up the file bag on the desk, smiled and nodded to Maslow, and went out to his office.

As soon as she sat down, Mikalica opened the file bag, and even if she saw the description of the case on the document for the second time, she was still very shocked and curious, and kept asking herself, is there really a ninja assassin organization that has existed in this world for thousands of years?

Mika, who was extremely curious, was completely immersed in the case of Ozu's crossbow for the past two days, and she didn't think that her leader, David Maslow, didn't ask her about the case in hand.

And David Maslow indirectly provided a lot of convenience for Mika after determining her case in Chaozu's crossbow, and even Mika handed over the case to her to ask a good colleague to help, Maslow just didn't know.

On the third day, Mika knocked on Maslow's office door with the file bag that her colleague had helped to process.

When Maslow finished reading the papers, Mika took the file bag of the Ozu crossbow and said, "Head, do you have time? I want to tell you something."

Taking the file bag handed over by Mika, Maslow rolled his eyes and said angrily, "Didn't you ask you not to look into this case? Ninja? This is the most ridiculous case I've heard this year."

"Head, just ten minutes, I'll delay you for ten minutes, you can't let me spend a few days in vain to investigate, and finally do all the useless work."

Maslow looked down at the file bag in his hand, happy that Mika's investigation had progressed, and worried that these cases were true, sighed, "I hope I won't regret listening to your report, okay, just ten minutes."

When the two came to the conference room, Maslow deliberately closed the door, but Mika didn't care about these at all, and said directly, "I checked all the original transcripts of the case in this document bag and found two very interesting clues."

"Two?" asked Maslow, curious.

"Yes, the two, whether it is a case from a hundred or two hundred years ago, or a case from the last few decades, or even the vendetta of the Gray Gang in New York not long ago, has one thing in common, and that is that in these cases there is a reference to a letter, a letter with no words but black sand."

Maslow took the file Mika gave him, looked at it and found that 70% of the file did mention black sand and envelopes, "What about the second clue?"

"Hehe, the second clue is that there are five or six cases in these cases, and there are witnesses who mention 100 pounds of gold," Mika pulled out a file from the file,

"I can't look into cases that are too far away, but I checked the New York banks in our database that have dealings with the black market, and found that the day before the Gray Gang vendetta murder, there was a transfer of funds equivalent to 100 pounds of gold.

In addition, the murderers used sharp weapons, not guns and heads, who would use knives to kill the Gray Gang with guns in this era."

Mika raised her eyebrows, a kind of meaning you know.

Maslow stood quietly, already believing Mika's reasoning, but said, "I still don't believe that if this Assassin organization really exists, their employment price will remain unchanged for a thousand years."

"But now we have evidence that they are real," Mika argued.

"Okay, that's a fascinating story, so be it for today," Maslow said without waiting for Mika to speak, pulling open the door to the conference room and returning to his office.

Sitting in the boss's chair, he silently thought about whether to investigate the case or not, and with the evidence and the email from headquarters, he was already convinced that the Assassin Organization really existed.

But Maslow was a little hesitant to really check it, this is not a joke, a bad one will die.