Let you condolences to the task force, have you solved the case?

The caravan nodded, signaling to the undertaker to carry away the body of Secretary Zhou Zhou.

"Don't cremate for now, we still need an inquest."

After two funeral home workers carried Secretary Zhou's body onto the stretcher, the caravan gave another order.

The two hurriedly agreed, and led by the man in the caravan, they carried the corpse downstairs.

"Let's go to the roof to investigate. There should be the first scene, and we may find something." The leader of the provincial department said immediately after the corpse was carried away.

But Su Mu said: "Time is urgent, we'd better divide our forces into two groups, the rooftop needs to be investigated, and the suspect needs to be questioned further."

The leader of the provincial department thought about it, and there was no objection. He turned to an expert and said, "Mr. Wu, you are good at interrogating, so take a few people to question those suspects."

Elder Wu immediately nodded in agreement.

He called a few people and was about to go downstairs for another interrogation, but Su Mu suddenly stopped him: "Mr. Wu, how do you prepare for the interrogation?"

Wu Laodao: "Naturally, it is based on the daily routine of the victim, Secretary Zhou. We have already inquired about the others just now, and we have not gained anything."

"Is there a specific breakthrough?" Su Mu asked again.

Mr. Wu was taken aback, he didn't have this point, he was just going to play by ear.

Su Mu pondered and said: "I have a breakthrough that may lead to some clues to the murderer."

"Oh?" Both the team leader and Mr. Wu were overjoyed, and Mr. Wu hurriedly asked, "What breakthrough?"

"Secretary Zhou's killing is closely related to his headache and illness, and the cause of Secretary Zhou's headache is his increased workload, so the person or thing that increases Secretary Zhou's workload may be a plan deliberately arranged by the murderer."

"Su Suo, do you suspect that...Xiao Zhang?" Old Wu's eyes lit up, and he hurriedly asked.

Su Mu nodded: "I just suspect that it's his diarrhea that makes Secretary Zhou's workload increase, and the two are too closely connected."

"Okay, I'll focus on this clue during the interrogation later." Elder Wu replied.

"In addition, the people or things that caused Xiao Zhang's diarrhea should also be found out. These are all suspicious points that affect the whole body, so we can't let them go." Su Mu finally urged.

"Okay, I'll pay attention." Mr. Wu nodded to Su Mu, then turned around and took people down to interrogate the seven people.

Seeing Mr. Wu accepting Su Mu's order and proceeding to interrogate with confidence, the team leader of the Provincial Department couldn't help grinning. He was very familiar with this Mr. Wu.

He has never obeyed anyone in the provincial department, and now he is so obedient to the words of a small deputy director of Jiangbin City, which is really rare and shocking!

"Let's go to the rooftop to have a look." Su Mu said, walking towards the rooftop first.

The leader of the provincial department immediately took the technicians and the caravan to the rooftop.

The roof is relatively spacious, surrounded by aluminum alloy railings more than one meter high, and the floor is paved with cement. After everyone went up and looked around, they couldn't help frowning. The scene was too clean. At first glance, it didn't look like the first murder a scene.

But what the police do is to find flaws and doubts in things that ordinary people can't find.

Without waiting for instructions, several technicians immediately started working according to their respective functions.

After Su Mu got on the roof, he made a turn around the railing from the entrance, then turned around again, made several turns like this, and finally returned to the entrance.

The leaders of the caravan and the provincial department were all baffled by Su Mu's behavior, saying that he was investigating, but he seemed to be watching flowers on horseback, and he didn't know what he was doing a few times?

"Su Suo, did you find anything?" The caravan asked curiously when they saw Su Mu return to the entrance and stood still calmly.

Su Mu waved his hand: "We'll talk about it after their investigation is over."

When the caravan heard this, they had no choice but to force their curiosity and wait for the technicians to finish their on-site inspection.

Time passed slowly, and after about half an hour, several technicians stopped their survey work and walked over.

"How is it? Did you find anything?" The team leader immediately asked the technicians.

Several technicians looked at each other and said with a wry smile: "No, we have carefully surveyed the scene and found nothing!"

"Did you find anything?" The team leader was stunned, and then muttered: "Isn't this the first scene? It shouldn't be. According to our analysis just now, this is definitely the first scene!"

"Su Suo, look at this...?" He turned his head to ask Su Mu for advice.

But Su Mu seemed to have expected it long ago, nodded, and said lightly: "As expected, there is no trace left."

Everyone was startled and looked at him curiously.

"Su Suo, what do you mean?" the caravan asked puzzled.

"The scene has been cleaned up. Someone reappeared at the scene after Secretary Zhou was killed, destroying the features of the traces."

"Otherwise, no matter how weak Secretary Zhou is, he will still resist in the face of life and death. As long as he resists, he will leave traces."

"But look here now, there is no trace of features, and it is even too clean!"

Su Mu looked around the rooftop with piercing eyes, and said in a deep voice.

Several people in the provincial department couldn't help but nodded, obviously agreeing with Su Mu's statement.

But the caravan immediately retorted: "This is impossible. It was dark last night. How could someone accurately erase all the traces unless he turned on the light, but as long as he turns on the light, there is a possibility of being discovered. The murderer should Don't dare to do that!"

Su Mu asked: "What if the murderer erased all traces in the morning?"

"Morning...?" The caravan was stunned, "Morning is the first time I go to the rooftop. I have a habit of coming to the rooftop every morning to practice kung fu. At that time, I..."

Speaking of this, the caravan suddenly seemed to remember something, and his expression changed.

"What suspicious point do you think of?" Su Mu immediately asked when he saw that the caravan's expression was not right.

The caravan said with an ugly face: "I was negligent. When I left the room this morning, I saw the cleaner Qian Li cleaning the first floor of the stairs."

When everyone heard it, their hearts tensed.

"Did you see him coming down the stairs?" the leader asked immediately.

"No, but it's possible if he's just come down the stairs."

"Is there anything wrong with this person?" The team leader asked again.

"This person cleaning will never interfere with other people's work. In addition, he is taciturn and has no sense of presence. Even if he stands there, he is easy to be ignored."

"Because of this, I almost ignored him just now."

After listening to the caravan's narration, Su Mu's expression changed slightly, and he said in a deep voice, "Such people are often the scariest, unobtrusive, and this is the most powerful ability of a killer!"

"Let's go down immediately and interrogate Qian Li." The leader of the provincial department said impatiently.

At this moment, his eyes were both excited and apprehensive. It was obvious that Qian Li might be the murderer, otherwise why would he destroy the scene?Find him, and the lost things may be found!

Chapter 256 The Broom and the Dustpan

According to Su Mu's analysis, everyone knew that Qian Li was very problematic, so they all went downstairs to interrogate him.

After Su Mu and the others went down to the first floor, they found that the seven suspects were left in each room, and several subordinates of the caravan were watching outside, and they were not allowed to move around.

In the first room, Mr. Wu and the others had finished the interrogation and were studying the transcript carefully.

Seeing Su Mu and others coming in, he stood up and nodded to everyone.

"Did you find anything?" the leader of the provincial department asked.

Mr. Wu shook his head, with a trace of frustration on his face: "We passed the interrogation of the researcher surnamed Zhang, and found no doubts. His diarrhea may be just a coincidence."

Because everyone had made a new discovery, they didn't show any disappointment. The team leader nodded: "Which room is Qian Li in?"

Mr. Wu hurriedly said: "The fifth room, what, is there a new discovery? Does he have a problem?"

The team leader smiled mysteriously: "It's a big problem."

When Mr. Wu heard this, his spirits lifted immediately, and he immediately said, "I'll take you there."

The team leader and others followed Mr. Wu to Qian Li's room. After they opened the door and entered, they found that Qian Li was sitting on a chair in a daze. Seeing Su Mu and the others coming in, he immediately stood up cautiously.

"Qian Li, these leaders have something to ask you, you know what to say, don't hide it!" the caravan said in a deep voice.

Qian Limang nodded to express his cooperation.

The team leader and several experts immediately put on a posture and began to ask questions.

After Su Mu came in, he observed Qian Li for a while, and found that he was really as the caravan said, with an introverted personality, as if he was not good at speaking, and he was restrained in front of everyone.

After observing for a while, Su Mu withdrew his gaze and scanned Qian Li's room again. The furnishings in the room were very simple, except for a bed, a table and a chair, and only cleaning tools.

Su Mu found that Qian Li had arranged all the cleaning tools in an orderly manner, even the broom and dustpan were neatly arranged.

"This is a person who is strict with himself, and also a thoughtful person. If such a person can't directly expose his pain, it will be difficult to pry his mouth!"

Su Mu immediately understood the difficulty of the interrogation. .

After scanning the room again, his eyes finally stopped on the broom and dustpan, but he only glanced at it, and moved away calmly.

"When did you get up this morning?" The team leader formally asked after asking about Qian Li's basic information as usual.

"Five forty." Obviously, he has been asked this question more than once, and he answered very quickly.

The team leader said again: "Tell me what you did after you got up."

Qian Li's attitude was still cautious, he slowly organized his language and began to narrate.

"After I got up and washed up, I started cleaning. As usual, I first cleaned the stairs and wiped the handrails..."

Qian Li didn't speak fast, every word was very slow, as if he was afraid that everyone would not be able to hear clearly.

But Su Mu found that every time he said a word, his eyeballs rolled slightly. Obviously, every word he said was carefully thought out, and he would never aim at nothing.

I can't help but shake my head at the moment, if I keep asking this question, I won't find anything at all.

After Qian Li finished his narration, the team leader, Mr. Wu and the others frowned unconsciously. According to Qian Li's narration, he didn't mention going to the second floor, and naturally he didn't mention going to the rooftop.

The team leader stared at Qian Li coldly. The latter lowered his head, as if he didn't notice the team leader's observation, and sat there silently.

The team leader and Mr. Wu looked at each other again, and the two frowned again. They were thinking about how to proceed with the interrogation. At this moment, Su Mu suddenly went straight in: "Have you cleaned the second floor?"

He asked in a very eager tone, as if he had discovered something but was not sure, so he wanted to ask it anxiously.

Both the team leader and Mr. Wu secretly thought it was bad. If Qian Li vetoed the question, and he and the others had no evidence, the interrogation would be very passive.

The two were about to have a question, but Qian Li said first: "No, I didn't go to the second floor."

When he said this, there was a hint of joy in the depths of his eyes, although it was fleeting, it was still caught by Su Mu.

When the team leader and Mr. Wu heard that Qian Li really couldn't wait to veto it and went up to the second floor, they both sighed in their hearts. Su Mu is still young. Although he has the ability to investigate and solve cases, the interrogation is obviously not good.

A good situation, just messed up.

When the two of them were depressed, they heard Su Mu say: "You are lying, you not only went to the second floor, but also cleaned the roof, didn't you?"

Seeing that Su Mu had already had a showdown, the team leader and Mr. Wu had no choice but to co-operate and sternly scare Qian Li: "Don't make unnecessary excuses. Since we ask this question, we must have the evidence!"

In fact, they knew that they and others did not have any evidence, but Su Mu had made it clear, and at this time they wanted to see each other with a dagger, either to frighten Qian Li and force him to confess, or to fail the interrogation without asking why.

Although everyone tried their best to cooperate with Su Mu, several old experts who were good at interrogation saw Qian Li's mouth twitching, revealing a smile intentionally or unintentionally, and their hearts sank: the interrogation failed!

Sure enough, Qian Li smiled slightly and said: "You may have misunderstood. I didn't go up to the second floor, let alone clean the roof. I only cleaned the first floor this morning, and stopped cleaning because Secretary Zhou was killed."

The faces of the team leader and other experts were extremely ugly for a while, but at this moment they were not ready to blame Su Mu, they were about to end the interrogation, and they thought of other ways to pry Qian Li's mouth away, but at this moment, Su Mu suddenly sneered One voice: "It seems that you don't cry when you don't see the coffin!"

"What do you mean?" Qian Li looked at Su Mu with a trace of mockery on the corner of his mouth. This guy is just a silver-like wax gun head, which is not good for anything, but fortunately, he escaped the catastrophe.

Su Mu glanced at Qian Li, and suddenly threw the broom and dustpan beside him in front of him.

"Can you explain what's going on? I know that you will clean the broom and dustpan after cleaning every day!"

Facing Su Mu's stern gaze, Qian Li was taken aback for a moment, and then looked at the broom and dustpan. His face changed suddenly, and he suddenly became pale and bloodless.

"This...I..." Qian Li stammered for a moment, not knowing what to say.

The team leader and other experts were also stunned at this time. Seeing Qian Li's face suddenly changed, they knew that Su Mu might have caught his weakness, and this weakness should be related to the broom and dustpan.

Everyone looked at the broom and dustpan.

"What can these two ordinary things have!" The team leader even muttered in his heart.

But when their eyes fell on the broom and dustpan, their pupils shrank immediately, and then they all showed surprise by coincidence.

I saw some cement dust on the broom and dustpan. This cement dust can only be contaminated by cleaning the cement road.

And the entire small building, including all the places on the first floor, has no concrete floor, except for the balcony on the second floor!

Chapter 257 The Dropped Button

The broom and dustpan were stained with cement dust. This seemingly ordinary trace was evidence that could not be evaded.

It was also because he realized this that his face changed drastically, and he was completely panicked.