As soon as Zhang Yu saw Ni Ni shaking her head, he could instantly realize that he had not found the target person.

According to Cao Dahua, there is no picture of the target leaving the bar in the surveillance for the time being, so people can't fly, right?

Zhao Xuan obviously did not want to stay in this place of right and wrong for a long time, and immediately said goodbye to Zhang Yu.

Zhang Yu smiled and nodded, and said, "Okay, you guys go back and rest first, and we'll see you tomorrow." ”

Zhao Xuan took Luo Xiang's hand and walked out, Luo Xiang turned his head and waved his hand to Zhang Yu as he walked, "See you tomorrow, don't be late......"

After saying this, she suddenly said again, "Teacher Su! ”

Follow, stop.

Hearing her words, Zhao Xuan and Meng Qiushi both stopped, looked back, and then greeted, "Teacher Su." "Teacher Su."

Several people walked over from the police registration desk, and one of them was a middle-aged woman who said, "Luo Xiang, Zhao Xuan...... You're all here...... What a coincidence......"

Zhang Yu has been staring at the people who came out, of course, he can't see any suspiciousness, after all, the people who have been registered are almost no problem.

This Teacher Su has big wavy hair and is of medium stature, about 165. Wearing a red T-shirt, gray slacks, black casual shoes, and a pair of chests that are not small, the neckline of the T-shirt is propped up.

Zhang Yu expected that Mr. Su was likely to be a teacher at Wunan University. I am now a student at Wunan University, and it is not good to look down and see you in the future, so it never hurts to say hello.

Seeing that Teacher Su walked in front of Luo Xiang and the others, he also leaned over and said, "Teacher Su, hello." ”

"Hello...... Excuse me, ...... are you" Teacher Su seemed a little confused, because she had never seen Zhang Yu at all.

Luo Xiang hurriedly introduced, "Teacher Su, his name is Zhang Yu, and he is a student recruited by our teacher this year. ”

"You are ......" Teacher Su was inevitably impressed by Zhang Yu, it was really because Zhang Yu did not arrive at the school, and his name had spread all over Wunan University.

Luo Xiang continued, "Zhang Yu, Mr. Su is an associate professor of the Department of Industrial Manufacturing of our Wunan University...... I also have a lot of contacts with our chemistry department...... Our experimental equipment is linked to Mr. Su's......"

"In the future, I will ask Mr. Su to take care of ......," Zhang Yu said earnestly.

"You're welcome...... You are Professor Yu's senior apprentice...... The future is bound to be limitless......" Teacher Su said politely with a smile.

Well?

Zhang Yugang was about to continue to be polite, but suddenly thought of one thing, that is, Cao Dahua mentioned before that the call record was about Zhou Ming, a professor at the Department of Industrial Manufacturing of Wunan University, and indecent photos of female students in the classroom. And this photo is still to be sold to the deceased.

This is really a coincidence, Mr. Su is also from the Department of Industrial Manufacturing.

It's just that, according to Fan Zhongping's description, the person who came into contact with the deceased was a man with a separate head, not a woman.

"This is not the place to talk, let's go first, and talk later." Teacher Su saw that Zhang Yu didn't speak again, so he said so.

"Okay, Mr. Su, let's go together." Luo Xiang said.

"Teacher Su, let's go." Zhao Xuan also said.

"Wait a minute!" Zhang Yu saw that they were about to leave, and hurriedly said.

Teacher Su immediately paused when he raised his footsteps, and did not make a sound.

She didn't speak, Zhao Xuan said, "Is there anything else?" ”

"Uh......" Zhang Yu hesitated for a moment, and just when Teacher Su proposed to leave, Zhang Yu suddenly remembered something. He then said, "Teacher Su, are you here alone?" ”

Most of the people who come to the bar to play are a few, and naturally there is one person who comes, but there are relatively few. For a person like Mr. Su, who goes to a bar to drink alone, it doesn't mean that he can't do it, but at least he should have a little bit of saying.

More importantly, Luo Xiang just said a sentence, that is, "Mr. Su also has a lot of contacts with our chemistry department, and our experimental equipment is linked to Mr. Su's side."

Moreover, Cao Dahua also said that the deceased was potassium cyanide poisoning. If potassium cyanide is less, the deceased will not die immediately, and if the rescue is timely, it can be saved. If there is too much potassium cyanide, the death of the deceased will be extremely horrific. Although the potassium cyanide under the murderer is a little more in dose, the purpose should be to ensure that the deceased will die directly after being poisoned, and there is no chance of rescue.

The person who can do this should be a person who understands chemistry.

Luo Xiang is three, obviously it is not very impossible, after all, they were together at the time. And this teacher Su, who understands chemistry, looks like he is alone.

"I'm here on my own." Teacher Su said.

"How can you drink alone?" Zhang Yu asked.

"I often drink alone...... Is there any problem......" Teacher Su said.

"Question...... Yes...... There is no ......" Zhang Yu's speech was very slow, but his eyes looked Teacher Su up and down.

He didn't know the bottom of his heart, and from the observation, Mr. Su didn't seem to have any problems.

"If not, then we'll go first, it's a mess here, what's the matter, let's talk at school." Teacher Su said in a calm tone.

"yes, it's a mess here, and when we get to school, there's a chance to chat." Zhao Xuan followed.

"Good...... I'll send you ......"

Zhang Yu said on his lips, but he looked at the position of Teacher Su's heart, and used his questioning technique, "Did you kill the person?" ”

"Yes!" Teacher Su's voice sounded in Zhang Yu's mind.

When Zhang Yu heard this, his head "buzzed", he really didn't expect that he had guessed correctly this time.

It's just that the gap between Mr. Su's appearance and Fan Zhongping's description is too big.

The person Fan Zhongping said was not found at all, but Mr. Su was the real murderer, what kind of connection is there between the two?

Zhang Yu's mind was spinning rapidly, and he also followed Teacher Su and Luo Xiang to walk out.

Seeing that he was about to arrive at the door, Zhang Yu said, "Wait a minute! ”

Teacher Su was the first to stop, but did not look back.

Or Luo Xiang turned his head and said, "What's the matter?" ”

"I want to ask Teacher Su something." Zhang Yu said.

"What's the matter?" Seeing Zhang Yu mention himself, Teacher Su turned around.

Zhang Yu turned his head to look at Cao Dahua and said, "Cao SIR, can you bring that bag over?" ”

He really did it, and he dared to let Cao Dahua take the bag directly.

Cao Dahua naturally knew which bag it was, so to speak, when Zhang Yu was talking to Teacher Su, he was also staring at Teacher Su. Now that Zhang Yu said this, Cao Dahua immediately walked over with Ni Ni, Wu Xiangwang and evidence.

When he arrived, Zhang Yu pointed to the plastic bag that Wu Xiangwang was carrying in his hand and said, "Teacher Su, have you ever seen this bag?" ”

Wu Xiangwang took out the bag in the plastic bag.

"I haven't seen it." Teacher Su shook his head directly.

"Can you be sure with just one glance?" Zhang Yu asked.

"This is a man's bag, how can I know it, of course I haven't seen it." Teacher Su replied.

"It seems to be the same...... It's just that Mr. Su is wearing this set...... It seems to be a bit nondescript......" Zhang Yu said again.