Han Bin listened to it twice. Indeed, someone claimed to be a teacher from the Institute of Foreign Languages and asked Cheng Haibin to pick up a gift from the school.
The caller's accent was deliberately concealing his real voice.
But he could tell that it was a woman's surname.
"Mr. Cheng, do you have any impression of this person's voice?" Han Bin asked.
"Weird voice, I don't remember."
"What did the person who gave you the gift look like?"
Cheng Haibin recalled. "I didn't see it clearly. When I was near the school building, she waved at me, put down the gift, and left. But judging from the figure, it looked like a woman."
"She waved at you, so she probably recognized you. Maybe you've seen her before. Try to recall her features, clothes, and shoes."
"She was a bit fat, wearing a black coat, and I don't remember what shoes she was wearing."
"What's your room number?"
"Qianda Hotel Room 703."
"According to the rules, we need to take your DNA and fingerprints, and your phone will be handed over to the police as evidence."
Cheng Haibin could only nod helplessly.
After Cheng Haibin left, Team One held another case summary meeting.
Cheng Haibin's situation was similar to Sharman's, and it was very likely that he was framed, but this was only his side of the story, and he couldn't be ruled out as a suspect.
Then, Ma Jingbo borrowed two members from Team Two to investigate the Institute of Foreign Languages.
Li Qin and Jiang Yang went to Qianda Hotel.
Huang Qianqian sent Cheng Haibin's phone to the technical department for testing.
Han Bin didn't stay idle either. He went to the entrance of the Public Security Bureau to greet Haruk.
Haruk didn't speak Chinese, so only Han Bin could communicate with him.
Haruk was in his thirties. He had a large beard, deep facial features, and tanned skin. His eyes and brows were somewhat similar to Zerai's, but he was much more handsome than Sharman.
When he returned to the office, Huang Qianqian happened to come back as well. She helped Han Bin record Haruk's statement. To put it bluntly, she was a human video recorder.
Han Bin made an inviting gesture. "Mr. Haruk, please sit."
"Thank you."
"Mr. Haruk, thank you for helping us with the investigation," Han Bin said politely.
Haruk shrugged. "It can't be helped. I have a silly sister."
"It sounds like you're unhappy with Zerai?"
"No, my sister is very outstanding. I love her, but I don't like her boyfriend."
"Sharman?"
"Yes, it's that guy. You've seen him before."
"Of course."
Haruk sneered. "Do you think he's good enough for Zerai?"
Han Bin smiled. He didn't know what to say.
"Yeah, I'd rather her marry a foreigner than Sharman."
"Yesterday, you were a guest at Zerai's house?"
"Yes, the foreign teachers' dormitory of the Qindao Foreign Language Institute."
"What time did you go?"
"I think it's around five o 'clock. Everything about Qin Island is good, but the curry is not authentic."
"When did you leave?"
"I think it's around nine o 'clock."
Han Bin made a note in his notebook. "Did you drink that night?"
"I don't drink, but Sharman did. Damn, this guy knows I'm a religious person, but he still drank in front of me. That's why I don't like him."
"What kind of alcohol did Sharman drink?"
"Beer, and two cans."
Haruk's statement matched Sharman and Zerai's. The three's statements matched each other, and Zerai's testimony was more convincing. After some consideration, Han Bin felt that Sharman could be ruled out as a suspect for the time being.
Huang Qianqian invited Zerai and Sharman over. Han Bin had one more question to ask them.
Han Bin invited the two to sit down and smiled. "Thank you for your cooperation. We've ruled out Mr. Sharman as a suspect."
Sharman breathed a sigh of relief. "Thank you, Officer Han. And Haruk."
Zerai put his hands together. "Officer Han, thank you very much."
Han Bin changed the topic. "I have another question for the two of you."
"What is it?"
"Who's David's girlfriend?"
Zerai's expression changed slightly, and he glanced at Sharman next to him.
Sharman took a deep breath. "Does this have anything to do with the case?"
Han Bin nodded. "Of course."
Sharman hesitated for a moment. "Actually, we're not very close to David, and we've never asked such a personal question …"
Han Bin reached out and interrupted Sharman. "Is it Chen Haijing?"
Zerai and Sharman looked at each other again.
Then, Zerai said slowly, "Actually, we're not very clear about this matter, and we've never asked David, nor did we dare to confirm it with Chen Haijing. But with a woman's intuition, I feel that their relationship is not ordinary."
"Officer Han, we didn't mean to hide it, but Chen Haijing is our leader after all, and we don't want to offend her." Zerai sighed.
"Okay, I understand." Han Bin got up and shook hands with the two. "Thank you for your cooperation."
"It's my duty." Zerai showed a sincere look. "Thank you again for clearing Sharman's name."
After watching the three leave, Han Bin fell into deep thought.
Sharman's suspicion was eliminated, so there were still two people who were more suspicious. One was Cheng Haibin, and the other was David's girlfriend.
According to Han Bin's speculation, Chen Haijing was very likely to be David's girlfriend.
David's mysterious girlfriend had never appeared in public, and Han Bin had also checked David's phone records, but he didn't find any contacts who seemed to be his girlfriend. However, David and Chen Haijing had always been in contact.
Because of their working relationship, no one suspected at first, but now it seemed that the relationship between the two was not ordinary.
Zerai's words were tantamount to confirming Han Bin's speculation.
If Chen Haijing was really David's girlfriend, then she would be the biggest suspect.
If David really broke up with Chen Haijing, Chen Haijing would have a motive to kill him.
Chen Haijing was familiar with the situation in the Foreign Teacher's Building, and also knew about the deal between Cheng Haibin and the Foreign Language School. She was very likely the person who called Cheng Haibin.
Of course, this was only Han Bin's speculation. Everything still depended on the evidence.
In fact, the reason why Han Bin guessed that Chen Haijing was David's girlfriend was through reverse reasoning.
Assuming what Cheng Lu said was true, that David really had a girlfriend, then this girlfriend had a motive to commit the crime.
And if it was really David's girlfriend who did it, just having a motive wasn't enough. She also had to be familiar with the situation in the Foreign Teacher's Building, know about the deal between Cheng Haibin and the school, and even have Cheng Haibin's contact information.
In reverse reasoning like this, Chen Haijing was the most qualified person, and besides the police, she was the person who knew the case the best.
Of course, speculation could not be conclusive, and evidence was needed to prove it.
Han Bin thought for a while, took out his phone, and called Chen Haijing's number.
"Hello, is this Director Chen?" Han Bin pressed the call record button.
"It's me, Officer Han. What can I do for you?"
"About the surveillance in the Foreign Teacher's Building, have you communicated with the school leaders?"
"Yes, the school leaders have decided to reinstall the surveillance."
"There is one thing I want to remind you, no one is allowed to enter the house that David used without the permission of the police."
"I know," Chen Haijing responded, and asked with concern, "Is there any progress on David's case?"
"It's still under investigation, and the school will be notified when there is a definite result." Han Bin finished speaking and hung up the phone.
"Qianqian, come here."
Huang Qianqian walked over, "Team Leader, what's the matter?"
"I'll send you a call recording, and you can compare it with Cheng Haibin's call recording to see if it's the same person's voice."
"Okay."
Although the person who called Cheng Haibin deliberately disguised their voice, making it difficult to distinguish for a while, they could still use professional equipment to identify whether it was the same person's voice.
If the voice comparison was successful, then Chen Haijing's suspicion would rise further.
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