Chapter 590 Simple and Effective Modus Operandi

This is also what Chen Yan is most confused about. Chen Ziqiang was suspected of being killed after he disappeared. This was a judgment made by Chen Yan and others.

So Chen Yan immediately arranged for Li Yun and others to search all the hidden corners within the surveillance blind spot.

All bathroom sewer drains and even septic tanks were randomly checked, but nothing suspicious was found.

Chen Yan even personally checked every classroom in the laboratory building and found nothing in every bathroom partition.

There are no traces of treatment on the walls of the bathroom, and the partitions have not been wiped. This statement is absolutely correct.

However, Zhou Haitao now said that he killed Chen Ziqiang in the outermost partition of the women's bathroom on the first floor of the laboratory building.

He beat people to death with a hammer. How is this possible?

If a person is killed by a blunt instrument blow, there will definitely be a lot of blood splatter.

Such spattering blood traces, even if they are carefully cleaned and wiped, may leave clues to be discovered. So how did Zhou Haitao do it?

Not only are there no traces left, there are even no traces of treatment on the walls and partitions!

"Zhou Haitao, I hope you will tell me honestly. I personally inspected the toilet partition you mentioned. There is absolutely no blood left. You said you killed Chen Ziqiang with a hammer, so why is there no blood?"

"This is very simple. I have thought of it a long time ago, so when I cheated Chen Ziqiang out, I covered the bathroom partition with three layers of plastic paper. I even covered the partition with plastic cloth to avoid blood stains. Go out and let you find out.”

"And I also wore a plastic disposable coat and gloves that day, so there would naturally be no blood stains."

Cover with plastic sheeting…

Chen Yan was a little surprised. He didn't expect this detail.

Zhou Haitao's method is indeed very effective. The entire partition is covered with plastic sheeting. All blood stains are naturally blocked and will not spray to the front or partition.

At that time, as long as all the plastic sheets are put away, nothing will be left in the bathroom except some bloody smell.

In a toilet with a window always open for ventilation, the smell will dissipate quickly.

However, besides these, there is another problem.

"What about the blood? Where is the blood left after Chen Ziqiang was killed?"

"After I killed him, I cut his aorta and put the blood in a small bucket."

Small bucket?

Chen Yan suddenly remembered the surveillance footage from the chef's class laboratory on the third floor. Zhou Haitao took leave on the day of the incident. When he returned to the laboratory, he picked up a small bucket and used the contents to make blood tofu.

"So, the material you use to make blood tofu...is Chen Ziqiang's blood?"

Zhou Haitao nodded: "Blood is difficult to process. I was afraid that it would leave traces and be discovered by you, so I took it to the kitchen on the third floor and made it into blood tofu. In this case, you would definitely not find it."

"How did you dispose of Chen Ziqiang's body?"

"It was broken down directly. After I killed him that morning, I broke it down. Well, then in the afternoon I took another crusher..."

What happens next is very clear.

In order to destroy the corpses and eliminate traces of them, Zhou Haitao used a crusher to dispose of the corpses, and then scattered the corpses in batches with backpacks into the kitchen garbage pile.

The kitchen waste dump where Zhou Haitao dumped his body was different from other kitchen waste dumps. It was not ordinary food waste from the school cafeteria, but bone fragments and other things left over from raw meat processed by students in the chef class.

It was a separately managed place and the smell of blood was very strong, so Zhou Haitao dumping his body in this place would not alert others at all.

"I cleaned everything up in two days, and then you came."

"Where's the hammer and grinder?"

"I threw the hammer in the trash. The grinder is in the laboratory on the third floor. After I used it, I cleaned it several times with soapy water. I also used the grinder to stir a lot of pork, so no one else noticed at all. What an anomaly."

call……

Chen Yan let out a long breath.

There are seven crushers in the experiment on the third floor. Chen Yan has seen them all, but to be honest, he has not found any problems.

Yeah, what's the problem with that.

The grinder will be cleaned after use, otherwise it will not be used next time.

Zhou Haitao not only used soapy water to clean it, but also used it to stir a lot of pork. Naturally, Chen Yan couldn't find anything unusual.

"You kill people and dispose of corpses on the first floor, aren't you afraid of being discovered?"

"It's okay. We were the only ones who had classes on the third floor during those two days. Everyone usually goes to the toilet on the third floor and never come to the first floor. Besides, I put a maintenance sign at the door during those two days and locked it with a lock. The toilet door is locked."

"No one will know at all. When I finish handling Chen Ziqiang's body and remove the locks, no one will notice."

"Where's the lock?"

"Throw it away, throw it into the trash together."

The murder weapon appears to have been missing.

The garbage pile is cleaned once a day. The garbage from two days ago has been cleaned up long ago, but fortunately there is still a crusher.

But he couldn't give up, and he still had to search as much as possible: "Chaoyang, talk to the garbage removal company and see if you can find the hammer and lock."

Zhang Chaoyang also knew that this hope was slim, but he still had to give it a try.

What if you find it?

"Where was the plastic sheet you used on the day of the crime?"

"Burn it. The night I killed Chen Ziqiang, I put all the plastic sheets in my backpack and went to find a place outside the school to burn them."

Yes, no traces were left.

When Zhou Haitao explained the details of the murder, Li Yun also found evidence.

There are two cameras near the kitchen garbage dump where Zhou Haitao's body was dumped. One of them is facing the direction of the garbage dump. Although it is far away, Zhou Haitao's appearance can still be distinguished.

At this point, Zhou Haitao's whereabouts from the laboratory building to the kitchen garbage dump where he dumped his body have been fixed by surveillance.

This means that with tangible evidence, plus the fact that Li Yun and others dug out the backpack used by Zhou Haitao to dump his body in the small cabinet in Zhou Haitao's dormitory, the entire case can be considered completely solved.

Since the backpack has been cleaned by Zhou Haitao, no blood stains can be seen on the surface, but there are still some soaked blood stains in the internal texture.

A day later, the test results of the blood stains in the backpack and the test results in the garbage dump came out.

Comparing it with the DNA of Chen Ziqiang's parents, it was determined that these blood stains and tissue components were Chen Ziqiang's.

At this point, Chen Ziqiang’s disappearance case has finally been solved!

Liancheng Detective Team, Zhang Yunhu's office.

"Captain Chen, you are so awesome. A disappearance case was suddenly solved into a murder case!"

Chen Yan: "..."

Chen Yan, who almost spit out his tea, really wanted to run away. Why did I solve the disappearance case into a homicide?

"Captain Zhang, Chen Ziqiang was originally killed, okay? If you don't praise me, forget it. Why do you still complain about it?"

He spat out the tea stems in his mouth and said, "Also, can you change this scented tea?"

"Didn't I give you a box of Dahongpao two days ago?"

"You have the nerve to say, just one box is enough for who to drink?"

Chen Yan: "..."

What you said makes sense!

"By the way, the leader is here today to ask you for leave. This is the leave note. Please approve it."

Um?

After taking Chen Yan's leave request, Zhang Yunhu didn't hesitate and signed his name: "Where do you plan to go to relax this time?"

Generally speaking, detectives who have completed a homicide case will take a break to rest and adjust their emotions.

Zhang Yunhu would approve Chen Yan's request for leave no matter how many days it took.

"I haven't decided yet. Let's go back and discuss it with Yun Yi."