Zhang Mengmeng took a deep breath, "I remember very well that night, my brother called me at seven o'clock in the evening and told me that he was temporarily on duty, so there was no way to pick me up." After that, I went home alone, and I also sent a message to my brother or something, and he didn't reply quickly, but not slowly. ”

After that, I went home alone. The last time I messaged my brother was after 9 p.m., and he hasn't replied since. I thought he was working, so I didn't bother. And the next day, I was told that my brother was ...... Killed. ”

After she finished speaking, her eyes were already slightly red, but there were no tears.

Yin Zetai frowned slightly, "That's all?" ”

Zhang Mengmeng nodded, "Yes, that's all." I wasn't with my brother at all, and I didn't know anything about him. And I also showed the original information and other things, and they also printed it out. ”

That's right, the printout of that information is now in Xiao Ning's hand.

On that day four years ago, Zhang Liang sent a message to Zhang Meng at eight o'clock in the evening, asking if she had arrived home, and after that, it was like chatting with ordinary brothers and sisters, and there were no useful clues at all.

Xiao Ning had already seen this picture over and over again, and it could be concluded that Zhang Liang at that time must not know anything. Little did he know that someone was already eyeing him.

Wait a minute......

Xiao Ning suddenly remembered what Zhang Mengmeng said at the beginning just now.

Temporary shift change?

In other words, more than four years ago, on the day Zhang Liang was killed, he should not have been on duty, but another police officer.

Xiao Ning immediately got up, walked out of the interrogation room, and came to Zhou Qing's office.

At the beginning, he was mainly responsible for this case, although it has been more than four years, there are very few unsolved cases, and he must still remember it deeply.

After Xiao Ning entered the office, he directly pulled out a chair and sat down, and took out the transcript about Zhang Mengmeng at that time, "What is written on this is what you asked about at the beginning?" ”

Zhou Qing glanced at it and nodded, "That's right, that's it, not a word." ”

Xiao Ning frowned and asked, "Did Zhang Mengmeng mention that someone changed shifts with Zhang Liang at that time?" ”

Zhou Qing pondered for a long time and shook his head, "It shouldn't be there, otherwise we would definitely check it at that time." ”

Also, when Zhang Mengmeng learned that her brother was killed, the whole person must have been in a very unstable state, and if she asked at that time, she would forget a lot of things. But now, four years later, she can think back.

Xiao Ning continued to ask: "Team Zhou, is there a way to find out who should be on duty on the day Zhang Liang was killed?" ”

"This ......" Zhou Qing was a little embarrassed, "I don't know about this, but I have asked all the police officers on duty at that time, and there are records here." If you look back, just ask them, they should know that. ”

"Okay." Xiao Ning immediately asked Zhou Qing to find the relevant records, and then went out in person, preparing to go to the area over there to inquire.

Regional public security bureaus are generally not large.

After Xiao Ning arrived in the car of the criminal police brigade, as soon as he showed his documents, a person in charge immediately stepped forward to receive him.

After all, whenever the criminal police brigade is involved, it is basically a murder, and they can't be allowed not to be nervous.

Xiao Ning sat in the conference room and explained his intention clearly, and the police officer immediately went to find someone according to the list, and soon, three police officers walked up.

These three people were all on duty at the Public Security Bureau four years ago.

Normally, two or three police officers on duty were sufficient, but because there was a meeting to be held at that time, more people were added.

The three of them sat across from Xiao Ning and did not show impatience.

Xiao Ning had already read their interrogation records before, but he still preferred to ask in person. And after four years, a lot of things will change.

Of the three police officers, one of them is relatively old, and he looks like he is about to be in his forties, while the other two are very young, probably about the same as Zhang Liang.

Xiao Ning first let the two of them out, leaving the older police officer alone, and asked, "Four years ago, do you remember Zhang Liang's case?" ”

The old police officer nodded, "Of course I remember, in more than ten years in our police department, he was the first to be killed." I'm afraid everyone will remember him except me. ”

Since he remembered, Xiao Ning didn't need to guide, but asked directly to the point: "Four years ago, Zhang Liang shouldn't have been on duty, who was the person who was supposed to be on duty?" ”

The old police officer frowned slightly, pondered for a moment and said, "This ...... I don't really remember much. You make me think about ......"

His hands twitched, his brow furrowed deeper, apparently in deep thought.

About five minutes later, he shook his head apologetically, "I really don't remember this, I went home first at that time, and when I came back, I saw Zhang Liang on duty with me." And I don't deliberately look at the duty schedule, as long as someone says I'm on duty, then I'll be on duty. Anyway, everyone is familiar with it, and whoever is on duty is the same. ”

Since he didn't even know this, then he wouldn't know why Zhang Liang stayed on duty.

Xiao Ning continued to ask about other things, "Have you noticed any strange behavior of Zhang Liang, or is there anyone who threatens to trouble him?" ”

The old police officer immediately shook his head, "This is really not, Zhang Liang, this kid is very polite, even if he arrests people, he has never been as rude as us." He is all aware of feelings, moved by reason, and reasoned with others. Four years ago, someone also asked us who had a holiday with Zhang Liang, and to be honest, I really don't know. At least during the period of contact I had with Zhang Liang, I hadn't met him at all. ”

Xiao Ning nodded, signaling that he could go out.

There was only one question he wanted to ask. For the rest, there were already answers four years ago. If a police officer chose to hide it four years ago, he won't say it four years later.

The second one who came in was a young police officer, looking at his information, he and Zhang Liang were classmates at the police academy, and they were also assigned to practice here, and then stayed together. The relationship between the two is very good, and Zhang Mengmeng knows him.

He stared at Xiao Ning, and before Xiao Ning could ask, he had already taken the lead and said, "Can you investigate who killed Zhang Liang?" ”

Xiao Ning shook his head, "I can't guarantee this, no matter how much I say before I find evidence, it's just useless words." ”

The young officer pursed his lips, "Just ask, I'll tell you whatever I know." Zhang Liang is my best friend, and I didn't agree with the above when I said that I wouldn't check it. As a result, the old leader was stopped, otherwise it would have dragged on until now. ”