Li Yaotai was stunned for a moment, and hurriedly entered the password in a panic.

Push the door in.

What caught my eye was the panicked Du Xianhuai and a dead female corpse.

Standing at the door, Li Yaotai felt as if his heart had stopped beating.

It was a corpse that was essentially identical to the previous two.

The white nightgown was messily scattered all over her body, and there were no other items on her body, making the strangulation marks on her neck particularly dazzling. The corpse was lying on its side, its hands firmly clasped to the floor.

Her eyes looked at the location of the door, Li Yaotai looked at her eyes, trembled deeply, and only felt very sad in her heart, "She has also fought desperately to survive." ’

His gaze slowly moved upwards and stopped at Du Xianhuai's eyes. The two looked at each other quietly for three minutes, and Zhang Yu looked at the scene in front of him and chose not to disturb him.

Three minutes is a short time, but Li Yaotai's world seems to have experienced the collapse of the sky......

Eventually, she stepped forward and handcuffed Du Huihuai's hands.

The whole process was surprisingly quiet, Li Yaotai did not question, and Du Xianhuai did not defend.

Li Yaotai escorted Du Xianhuai out, Zhang Yu hurriedly flashed to the side, and said embarrassedly, "You go back first, I'll stay and take a look at the scene, and I'll notify someone to pick up the body." ”

Li Yaotai nodded stiffly, and indifferently escorted Du Huihuai out of the room.

Five hours later, inside the police station.

Zhang Yu raised his hand, and just wanted Li Yaotai to introduce the basic situation, but seeing her absent-minded appearance, he gave up this idea.

Zhang Yu stood up, walked to the whiteboard, and said while writing: "Today, there were three homicides in Zhaoguan University, the first one occurred in the abandoned playground on campus, the deceased was named Zhuo Yuanyuan, female, 21 years old, first raped and then killed, and died of suffocation. In the second case, downstairs in the main teaching building, the deceased Qin Ge, female, 21 years old, first raped and then killed, and died of suffocation. Third ...... In the living room of Du Xianhuai, a professor of criminal psychology at Zhaoguan University, the deceased is You Miao, and the only difference between the other two is that they kill first and then rape, and everything else is the same. ”

Zhang Yu paused, "The three deceased were classmates in the same dormitory, and the dormitory of Zhaoguan University was a four-person dormitory, and the last student in the same dormitory was named Li Jun, who committed suicide a year ago. ”

Zhang Xian turned around and pasted a photo on the whiteboard, "There are no traces of violent destruction of the doors and windows of Du Xianhuai's house, and only the fingerprints of Du Xianhuai and Li Yaotai have been extracted from the door lock, and in his laundry basket, we have found two ties, on which the DNA of Zhuo Yuanyuan and Qin Ge were extracted......"

Zhang Yu stopped, glanced at Li Yaotai, and continued: "Moreover, we have extracted the sperm belonging to Du Xianhuai in You Miao's body. ”

Li Yaotai raised his head violently and asked Zhang Yu for instructions, "Team Zhang, can I talk to Du Xianhuai?" ”

Zhang Yu didn't reply, just stared at Li Yaotai, and after hesitating for a moment, he still agreed to her request.

After Li Yaotai took a deep breath, she pushed open the door of the interrogation room, she looked at Du Xianhuai with a calm face, looked at it for a full minute, and then asked, "Is it you?" ”

Du Huihuai pushed his glasses, and then said slowly: "First of all, I want to explain the situation tonight, after I got home tonight, I turned on the light and saw the corpse on the ground, and before I could do anything, you came." ”

"You didn't do it!"

"Secondly, I would like to raise a question, if it were me, why did I choose to rape first and then kill in the first two times under uncertain conditions, and instead reversed the order of the crimes under such very safe conditions tonight?"

"Maybe you didn't make it ...... before You Miao died"

"My answer is that the murderer should leave sufficient evidence in order to convict me faster, the more intuitive the better, and under the premise of rape first and then killing, his completion is too difficult, and he does not have enough time to commit crimes again, so that the criminal chain is more complete."

Li Yaotai didn't say anything this time, and looked at Du Xianhuai quietly, waiting for his next step.

"The last thing I want to say is that Li Jun committed suicide, there are rumors on campus that it was because of campus violence, and the perpetrators were three other people in the same dormitory, and on the day of Li Jun's death, the three of them and other friends sexually insulted him, which led to Li Jun's suicide."

"Does this incident have anything to do with Li Jun?"

"Li Jun's father's name is Li Nian, after Li Jun's death, Li Nian came to Zhaoguan University to do a school worker, it is the school worker Li Nian who is on duty today, you may not know these because you went abroad as an exchange student."

After listening to Du Huihuai's self-talking, Li Yaotai felt that his brain was blank, and he didn't know what to do next for a while.

Du Huihuai leaned back in his chair, looked like a send-off, saw that Li Yaotai was still in place, and gestured to the door of the interrogation room with his chin.

"Don't waste time here, hurry up and find clues to convict Li Nian, if Li Nian runs away to another place before you find the evidence, it will be difficult for you to arrest him."

As soon as the words fell, Zhang Yu pushed the door in, "You come out." ”

Zhang Yu led Li Yaotai to the conference room, and after sitting down, he signaled that the squad sleeve could start reporting.

Ban Sleeve put the autopsy report in front of Zhang Xiang, "First, there is not much difference between Qin Ge and You Miao's death time, but in my judgment, You Miao's death time is slightly earlier than Qin Ge's. ”

Ban Sleeve paused, glanced at Li Yaotai, and continued: "Second, the sperm in You Miao's body is confirmed to be Du Xianhuai's, but there are traces of cryopreservation, which Team Zhang has also confirmed, Du Xuanhuai did have frozen sperm in his early years for some reasons, and it is not difficult to put the prepared sperm into the corpse. ”

"Bang."

Xiao Xiao "barged" into the conference room with a computer, "Team Zhang, I'm done checking." ”

After getting Zhang Xiang's approval, Xiao Xiao reported, "I just checked the relevant information about Li Nian, who came to Zhaoguan University ten months ago as a school worker, during which he behaved well and was not at fault, and his daughter committed suicide by jumping off a building due to campus violence a year ago. Li Nian is 41 years old this year, and this is a photo of Li Nian. ”

As he spoke, he projected Li Nian's photo on the screen. Zhang Yu nodded, waved his hand and said, "Okay, according to the usual division of labor, let's get busy." After speaking, everyone quickly dispersed to go about their work.

Li Yaotai walked up to the pale face of Ban Sleeve and asked worriedly, "Senior Sister Ban, are you okay?" You look bad. ”

Hearing this, Ban Sleeve glanced at Li Yaotai, shook his head and said, "I'm fine, let's get busy, my boyfriend is still waiting in the interrogation room." Then he walked to the medical examiner's office without saying a word.

Li Yaotai glanced at the back of the departing squad with concern again, and began to get busy.