"Who are you playing mahjong with?" Su Yan asked Liu Hongdao.
"I was with..." Liu Hong then said the names of three people.
Director Zheng nodded slightly to Su Yan, indicating that he had sent people to check those three people. Su Yan nodded and asked someone to take Liu Hong out.
"Could Liu Hong be the murderer?" Xu Cheng asked suspiciously after Liu Hong was taken away.
Director Zheng said: "If the other three people were really with him last night, their suspicions can be eliminated, otherwise this person is the most suspect."
Su Yan lowered his body and observed the corpse again for a while, then said: "The ring on Liu Hong's finger is inconsistent with the mark on the deceased's neck. If he did not change the ring, this person should not be the murderer."
Xu Cheng and Director Zheng looked at each other in surprise. Just now, Su Yan only looked at Liu Hong's ring for a short time, and could he quickly tell that the ring was inconsistent with the scar?
Officer Su’s eyes are so vicious!
How did they know that Su Yan had on-site investigation skills and super memory. He could distinguish clearly even with a glance, let alone a short look.
Su Yan stood up and asked the fat security guard: "Is there anyone else in the factory who wears two rings?"
"No more. I only found that Deputy Director Liu was wearing two rings." The fat security guard thought for a while and shook his head affirmatively.
"Does Liu Hong have any grudge against anyone in the factory?" Su Yan frowned and continued to ask.
When Director Zheng and Xu Cheng heard this, they both greatly appreciated Su Yan for raising this question.
If Liu Hong has a grudge against someone, it does not rule out that someone will know his character and frame him for the crime!
"Although Deputy Director Liu is a high-profile person, his character is relatively weak and timid. I don't know who he has a grudge against!" The fat security guard shook his head again.
Seeing that the fat security guard couldn't ask anything, and the scene was completely destroyed, everyone had to leave a few people to deal with the aftermath, and the others walked out of the toilet.
After going out, Su Yan looked around. I found that the toilet was separated from the outside of the factory by a wall, and outside the wall was the road.
"Most people can't climb through this wall." Xu Cheng said from the side when he saw Su Yan looking at the wall.
Su Yan nodded, turned around and asked the fat security guard: "Is there any surveillance video around here?"
The fat security guard said: "There is surveillance video at the gate of the female workers' dormitory, but it is far away. Even if someone enters this toilet, they can't see it."
"Take me and take a look." Su Yan did not comment on the fat security guard's words, but asked to view the surveillance video.
Since there were no other clues in the case, Liu Hong and the three time witnesses were being investigated. Xu Cheng, Director Zheng and others followed Su Yan to watch the surveillance video.
The surveillance video is in the security room, which is some way away from the toilet.
When everyone watched the fat security guard pull up the surveillance video, they couldn't help but shake their heads in disappointment.
There was no moonlight last night, and it was completely dark in the distance. Except for the firefly-sized street lights outside the wall, nothing could be seen at all.
Even if the murderer reaches the scene of the crime, he cannot be found.
Su Yan was not discouraged, but continued to check the surveillance video thoughtfully.
The deceased died between ten and twelve o'clock last night. When everyone watched the video during this period, they found nothing and became bored and prepared to leave.
Unexpectedly, Su Yan said to the fat security guard: "Go forward one hour and play it again."
The fat security guard had no choice but to play the video again according to Su Yan's instructions.
Everyone was startled when they saw Su Yan staring at the monitor, as if looking for something.
"Officer Su, what do you want to see?" Director Zheng couldn't help but ask.
Su Yan did not answer. After watching the video, he raised his eyebrows suddenly and said in a deep voice: "Besides the deceased, there were two other people who went to the crime scene last night. The second person who came to the crime scene was the murderer."
"The murderer was not tall, under 1.6 meters. He arrived at the crime scene at 10 o'clock and left at 10:20. He stayed at the crime scene for 20 minutes."
"...?!"
Everyone was stunned when they heard Su Yan's words, and the scene fell silent for an instant.
After a while, Xu Cheng was speechless and asked: "Officer Su, you... how did you come to these conclusions?"
Everyone watched the video just now, but found nothing.
Su Yan personally switched the surveillance video to a certain point in time, and then said, "Watch the video carefully."
Everyone leaned over to watch. In the video, the toilet in the distance was completely dark, and only the street lights outside the wall could be vaguely seen shining through the gaps in the wall.
But the light is too small and far away, so even if someone appears, you can't see it.
After watching for a while, everyone shook their heads, indicating that they found nothing suspicious.
Seeing that no one could see it, Su Yan adjusted the video to a time period again, and then said: "Look carefully at the street lights outside the wall."
After being reminded by Su Yan, everyone looked at it carefully for a while, and suddenly Xu Cheng let out a light sigh: "The street lights blinked in two very short periods of time."
Seeing that Xu Cheng noticed it, Su Yan nodded slightly and said, "Yes, I blinked twice."
Others at the scene still didn't understand and asked in confusion: "What does this mean?"
Su Yan explained: "This means that when the street light blinked, someone walked by, and his body just blocked the street light, so the street light went dark."
Good guy!
When everyone heard this, they were all so shocked that they almost dropped their jaws.
Su Yan discovered such a detail, it was amazing!
At this time, everyone was convinced why Su Yan had repeatedly solved major cases before. He was really capable!
"Officer Su, how did you find out that two criminal suspects arrived at the scene?" Director Zheng asked in an almost respectful tone.
Su Yan rewinds the video a little.
"Look at the blinking time of these two street lights. The interval between them is very short, only a few seconds. This means that two people arrived at the scene first, and they were together."
Su Yan then sped up the video for another five minutes, then pointed at the video and said: "After the two people arrived at the scene, one of them left quickly. He stayed at the scene for about five minutes."
"But the second person did not leave the scene until the third person appeared..."
Su Yan fast-forwarded the video again. About twenty minutes after the previous man left, the street light flashed again.
"This was the third person who appeared. Twenty minutes later, the streetlight blinked again, which meant that the third person stayed at the crime scene for twenty minutes and then left."
"Hiss!" After listening to Su Yan's analysis, everyone gasped almost simultaneously.
They looked at Su Yan as if they were looking at a god.
Not only have they seen such observation and analysis, they have never heard of it!
It took a long time for everyone to wake up from the shock.
"Officer Su, there is another question that I understand very well. Can you explain it?" Xu Cheng even addressed Su Yan as "you".
Su Yan smiled and said: "You want to ask me how I know the height of the murderer and the identity difference between the three people?"
