Qiao Yan looked around the interior, the space was very large, and the overall decoration was gray and white. There were all kinds of advanced instruments and equipment, and there were five staff members, including Cao Chongshan, all wearing the same white coats as forensic doctors.

"You look at this video first." After Wei Chihong processed the surveillance video, he simultaneously showed on the screen the images of Wei Yishan leaving the dormitory and returning to the dormitory on the night of the crime.

Qiao Yan looked at it carefully and found no problems. "Wei Yishan disappeared after returning to the dormitory?"

"It's not." Wei Chihong pointed to the screen, "First of all, at 6:50 on the night of the crime, Wei Yishan walked out of the dormitory building. She then returned at 9 a.m. At first, we all thought so, but in fact, we ignored what we saw. That back figure is not Wei Yishan, although the dress is exactly the same, but this person's gait is completely different from Wei Yishan, I was inspired by the way I saw you walking from behind just now. ”

Qiao Yan's expression was a little embarrassed and embarrassed, she was still lame, and she must have looked ugly when she walked.

Wei Chihong didn't pay attention to Qiao Yan's expression, and was busy confirming it with the help of analysis software. "The way people walk is the same as fingerprints, and they have their own characteristics. A person's gait is characterized by walking, and the chance of having the same gait as others is almost zero. So as long as there is a video of walking, you can lock the character from the way you walk. ”

"Walking gait?" Qiao Yan thought to herself how he knew everything, and he was really multi-talented.

"If you look closely, the people who come out from above, and the people who come back from below, walk completely differently." Yu Chihong's eyes flashed with hope, "As long as you find someone with the same gait, you can solve the mystery of Wei Yishan's disappearance, and then find the murderer." ”

It was the first time Qiao Yan saw the look in Yu Chihong's eyes. Is it only when investigating a case that you can feel his temperature? She looked up at him, only to see that he was looking at her quietly.

Her eyes drifted with the clear eyes, her eyelashes flickering, avoiding his.

"Men are strictly prohibited from entering the girls' dormitory, and security guards have confirmed that no outsiders have registered to enter before the fire broke out, and no suspicious people have been seen. The person who can pretend to be Wei Yishan to enter the dormitory building should also be a girl living in the girls' dormitory complex, and the fire that night is likely to be caused by her. ”

Qiao Yan said in one breath, almost forgetting to pause, "The only intersection that several victims know so far is that they live in the same girls' dormitory, and it is very likely that the prisoner has the opportunity to contact the target through this person who pretends to be Wei Yishan." She told Wei Chihong in detail the conclusion of the morning's portrait.

"Re-watch the video, make sure to find that person first!" Wei Chihong's face returned to coldness.

The two watched the tape backwards several times, and finally locked on a short-haired girl, and after comparing it with the analysis software, her gait was exactly the same as that of the person who was pretending to be Wei Yishan. The girl left the dormitory building at 5 p.m. that day, her posture and posture were very similar to Wei Yishan, as long as she wore a wig, her back could be fake.

Yu Chihong immediately asked people to investigate the girl in the picture.

Qiao Yan sat up straight and stretched. Keeping the posture of watching the video for a long time, my waist and legs are a little sore. I unconsciously looked at the window beside me, and it was dark outside, and there was a drizzle. The windows were not closed, and the wind and rain poured into the room with the coolness. She felt the cold and shrunk her neck. When people are focused on something, it is easy to lose sight of the things around them, and even themselves.

Qiao Yan sat by the window, with a table behind her, and the space was very small. Yu Chihong squeezed behind Qiao Yan and wanted to close the window, just as Qiao Yan also got up and was about to close the window. Qiao Yan got up, and Yu Chihong's right arm wrapped around her shoulder impartially, looking from behind, it looked like Qiao Yan's whole person was encircled in his arms.

But this scene was seen by Cao Chongshan, who came over with a pair of shoes. "Hey—" he shouted at the top of his voice.

At this shout, the others in the laboratory turned their heads in unison. As soon as Qiao Yan felt wrapped in a familiar aura, she heard Cao Chongshan's exaggerated shout. When I looked back, my cheeks were crimson, and there was an embarrassed expression in my eyes.

But Wei Chihong even insisted on closing the window, and when he closed the window, Qiao Yan was imprisoned in his arms, unable to advance or retreat. His movements were swift, but they were done in a matter of seconds. Qiao Yan quietly raised her eyes, her heart was beating inexplicably, and her breathing was involuntarily short. She could only turn her head to look out the window, trying to calm her emotions.

"Is there something wrong?" Yu Chihong looked at Cao Chongshan coldly.

"Ah, that—" Cao Chongshan's tone turned, "It's nothing, I'm here to deliver shoes to Xiao Qiao." ”