"Your way of spending here is really different from ours," Zhao Yu said. "Do you have to swipe a credit card to buy a tricycle?"
An hour later, in a quiet office, Zhao Yu was telling Li Zhenzhu and Yangshan Masako about his reasoning process.
"The prices are too high," Li Zhenzhu said. "The tricycle is not cheap either! Moreover, there is a preferential policy for using a credit card. "
"Here," Zhao Yu said, placing a document in front of Li Zhenzhu. "This photo is of the Han Cheng couple's fish stall. Do you see it? They already have a tricycle! "
"For such a small fish stall, a tricycle should be enough, right? Why did they buy a new one? "
"So …" Yangshan Masako said in surprise. "You found out the problem? Swiping a credit card to buy a new tricycle? Oh my god, what kind of brain do you have? "
"The point is," Zhao Yu said. "They bought the tricycle at the right time, just before Li Yiyan was killed!"
"So …" Li Zhenzhu said. "You think that Li Yiyan's death has something to do with them?"
"Yes!" Zhao Yu nodded. "There are also traces of Li Yiyan's body being moved. The only vehicle that can be driven into the park is a tricycle.
"Of course, the reason why I pay so much attention to the tricycle is that I just solved the Ghost King Case!"
"Oh …" Masako's eyes lit up. "I remember now. The murderer of the Ghost King Case also cleverly used an electric tricycle!
"It's convenient and deceptive. This thing is almost called the king of murder!" Masako said excitedly. "I have to write it down. It will definitely be useful in the future!"
"Of course, we can't be sure just because it's a tricycle," Zhao Yu said. "I carefully studied the families of the ten victims who participated in the Mutual Aid Association and found that most of them could be eliminated. Only Cui Dongshan and a few others could have taken the risk!"
"Because they lost their most important or only relative in the bus fire," Zhao Yu said.
"Only a few of them would be blinded by revenge, and they would have a certain level of ability."
"So, I think …" Zhao Yu said meaningfully, "The reason why the Black Pupil killer chose them from the many families of the victims, was probably because of these points?"
"You're really something," Li Zhenzhu said. "When we went to the bar together to investigate, did you already guess that someone might be pretending to be Kwon Youdong?"
"No," Zhao Yu clarified. "At the bar, according to the driver's testimony, Kwon Youdong suddenly asked to go home after going to the washroom, which was a bit unusual!
"At that time, I only thought that the problem might be in the bathroom.
"Not only is the bathroom on the first floor, but it also has an open window that can be opened from the inside!
"The passage is outside the window, which makes me feel very strange. In our country, we definitely have to install anti-theft windows!"
"Then …" Li Zhenzhu quickly asked, "When did you realize that there was something wrong with Cui Dongshan?"
"Last night," Zhao Yu said frankly. "It wasn't until last night, when I combined all the information, that I realized that someone might be pretending to be Kwon Youdong, and that person was Cui Dongshan!"
"First of all, as you can see, if the beard is removed and the hairstyle is changed, the two of them are very similar in terms of body shape and facial features.
If they were to change clothes and put on some makeup, it would be very difficult to be discovered in such a dark environment! "
"Secondly," Zhao Yu said, "I chatted with the driver for more than two hours that day. The driver told me about the wallet and the sunglasses!"
"When the driver drove Kwon Youdong home, Kwon Youdong was wearing big sunglasses, which was different from usual. Why did he keep it on when he was so dizzy from drinking so much? It was obvious that he was pretending to be Kwon Youdong! "
"Plus, this was the only way to explain why Kwon Youdong, who was usually too lazy to walk, had to walk back to the villa after he got home!"
"Finally, when I found out that Cui Dongshan used to be a soldier, and that he was in the police dog unit, the idea naturally became stronger.
"Only then did I realize that they had actually played a trick on us!"
"That's amazing," Masako exclaimed. "Even so, you didn't say a word to me last night. You're really bad, detective Zhao!"
"That's not bad. If you really gave me a bath, you'd know what's bad!" Zhao Yu said casually. "I just needed to prepare all the information!"
The two women looked at each other, speechless.
"The report said that there were no valid fingerprints on Kwon Youdong's wallet," Zhao Yu continued. "Obviously, Cui Dongshan wiped it at the end, so he didn't want to leave his fingerprints on it."
"Also, the autopsy report said that there was a long indentation mark on Kwon Youdong's back. I think that it was made on the bar's bathroom window."
"Also, there was a regular but not obvious indentation mark on his back. But, the garden floor of Kwon Youdong's house was flat, so it was different from the indentation mark on his back."
Zhao Yu looked at Li Zhenzhu and said, "So, I suspect that the place where Kwon Youdong was killed might not have been his house. It's possible that … it was made from Han Cheng's tricycle!"
"You …" Li Zhenzhu pouted. "Couldn't you have told me earlier?"
Then, she quickly walked to the side and informed her detectives to look for Han Cheng's tricycle.
"I've seen the indentation mark before," Masako said with a frown. "But, it's not on Li Yiyan and Liu Bingcheng's bodies. Is it not a tricycle? "
"The indentation mark is not obvious. Li Yiyan and Liu Bingcheng are too light," Zhao Yu said. "Maybe it's not obvious, but Kwon Youdong is different!"
Beep beep beep … Beep beep beep …
Then, before Li Zhenzhu could interrupt, her phone suddenly rang again.
"What?" Li Zhenzhu immediately opened her eyes wide and said to Zhao Yu, "On Kwon Youdong's sunglasses, we found the dandruff tissue that matches Cui Dongshan's!"
"That's great!" Masako clenched her fists excitedly. "Then, Cui Dongshan won't have to plead guilty! I really hope that we can find out who the Black Pupil killer is soon! "
Putting down the phone, Li Zhenzhu said, "I think it's going to be tough. Cui Dongshan is a silly person. The more he is like this, the more he ignores our evidence, and the harder it is for him to confess!"
"It's okay," Zhao Yu said. "Don't we still have the Han Cheng couple and Pu Yushun? How are they? Have they been caught? "
"Close the net now," Li Zhenzhu said. Then, she turned on the big screen in the office and said, "It's live!"
"Remember," Zhao Yu said. "After you catch him, strike while the iron is hot!"
"Don't worry!" Li Zhenzhu nodded and turned up the volume on the big screen. Then, she sent an arrest message to her subordinates.
After the message was sent, the detectives in the video took action quickly. They immediately rushed to the seafood market and pinned down the Han Cheng couple, who were cleaning up the fish stall.
At the same time, one of the detectives shouted, "What's your name? Speak! What's your name? "
"Han … Han Cheng …" The man on the ground didn't struggle and immediately said his name.
"What about you?" The detective asked the woman again.
"Li Xuanmei!" The woman didn't struggle and answered calmly.
"Do you know …" The detective followed the script and asked, "Why are you being arrested?"
In the end, Han Cheng's answer surprised Zhao Yu.
A gratified smile appeared on his face, and he said with relief and determination, "I know, I am — the Black Pupil Killer!!!"
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