Everyone continued to carry out a dragnet investigation in accordance with Ma Shangkui's ideas and deployment, that is to say, digging three feet into the ground to arrest the murderer hiding in the shadows. The key difficulty lies in the framework of "internal and external collusion", who is "inside" and who is "outside", but it is difficult for everyone. According to Jiang Chenghuan's original idea, there is no difference between inside and outside, everything revolves around the conclusion of the autopsy and the monitoring information, so he can only obey his orders, take one step at a time, and there is always a time to turn around.

Of course, Ma Shangkui also has relevant deployments, one is to check the surveillance, the second is to find the source of the corpse, and the third is to find the source of the poisonous rat.

This also comforted Jiang Chenghuan.

When the monitoring data was retrieved, because there was no exact time period and a clear road section, the monitoring brigade carried out a dragnet investigation, and all the monitoring on the upstream manhole street in the urban area that flowed through the scene of the murder were all investigated, and repeated investigations, never missing a corner, it is conceivable how much work is done, and the degree of hard work can be seen.

The effort paid off, and on the outskirts of the city, a civilian camera captured a suspicious footage. When a man and a woman pulled a pair of carts in front of them, they were covered with a thick tarpaulin, and there seemed to be something on them. The two of them hurried forward with their heads bowed, as if they were in a hurry. Because it was early in the morning, the sky was slightly bright, and I couldn't see the appearance of this man and woman clearly, and I felt that it was a young man. It's impossible to tell what's on board. Obviously, this is a very important clue.

When the monitoring team provided this important clue, the criminal police detachment carried out a survey along the way according to the direction of travel. Of course, there is a focus on the drainage, that is, the sewer manholes along the way. Since the body was in the sewer, the manhole was the only entrance, so I counted it, and from the discovery of the cart to the manhole where the body was found, there were about three kilometers in total, and there were about thirty manholes in total. Use the elimination method to eliminate the manholes that have been monitored, there are more than ten manholes left, and then further exclude the intersections that are inconvenient to throw corpses, such as relatively lively intersections, or intersections such as morning markets, there are few left, and finally confirm three manholes.

Then, they opened the manhole covers one by one, and found suspicious marks along their hands from the manhole cover and the manhole entrance. At this stage, the tracer Zhang Kehua came in handy, he was a specialist in trace detection, he was an expert in this field, and he was very experienced, and he knew where to start to find suspicious clues. When the second manhole cover was inspected, suspicious traces were found.

On the edge of the manhole, there are obvious traces of squeezing and dragging. Since the edge of the manhole is made of pig iron, which is very hard, and the soft material will inevitably stick once it is squeezed, Zhang Kehua found a fine plush residue on the pig iron on the edge of the manhole and extracted it. Then, Jiang Chenghuan glanced at the white rabbit standing aside. The white rabbit suddenly understood that he had let the white rabbit go down the manhole.

"I don't do it." The White Rabbit shook his head and pursed his lips high.

"What?" Zhang Kehua on the side was focusing on the residue, not paying attention to their small movements, suddenly saw this situation and hurriedly asked, and at the same time quickly reacted, "Why do you let a beautiful girl go down the manhole, how dirty it is down there, you can really open this mouth!" ”

Zhang Kehua obviously has an opinion, and put on a posture of being shoveled on an uneven road, which won the attention of many red faces.

"You're really going to grasp the opportunity, and I'll convince you of this gap to win the fragrance, haha," Jiang Chenghuan laughed, "But did you know my intentions?" I'm afraid I only know one thing, but I don't know the other. ”

"What's the intention, what is the first, the second, I just know that this thing was not done by a girl's family," Zhang Kehua's upright temper came up again, "You don't go down, right, okay, I'll go down." ”

After speaking, he shouted behind him, and Mi Yin behind him wasted no time in handing over the ladder, and at the same time, showing a malicious smile. Zhang Kehua didn't notice this, and stretched out the aluminum alloy telescopic ladder into the manhole, and at the same time, one foot had already poked down.

"Hey ......"

Just when Zhang Kehua had just stretched one foot down the manhole and had not stepped on the ladder partition, Jiang Chenghuan fed him unexpectedly, and Zhang Kehua instinctively paused and looked up at him.

"Why?"

"Oh, didn't you do it, I just wanted to ask, did you really go down yourself?" Jiang Chenghuan knew his temperament, and he couldn't pull back the things he decided.

"Then you mean to say that you don't want me to go down in person, I'm sorry, you want to go down in person." When Zhang Kehua said this, the foot that stretched out began to retract, "That's good, the gentleman doesn't take away the beauty of people, you please." ”

As he spoke, his foot had landed firmly on the ground, and he stood up and stared at Jiang Chenghuan. The white rabbit on the side also stared at him with strange eyes, silent.

In this way, it was Jiang Chenghuan's turn to be embarrassed, and he didn't know what to do for a while, neither advance nor retreat. Entering, which means that you have to go down the manhole and retreat, which is a bit despised by everyone present. Originally, he wanted to play tricks on Zhang Kehua, make full use of Zhang Kehua's upright personality, let Zhang Kehua bear the cost that Geng's upright personality must bear, and play a cat-and-mouse comical game.

"Hurry up, if you don't hurry, what, oh, yes, the ghost, the ghost is going to slip away from the manhole."

The white rabbit on the side gloated and greeted him with a bright expression.

Jiang Chenghuan was helpless, so he had to tell the manhole slowly and stretched out a foot. Then, he retracted that foot again, turned his head and said to Zhang Kehua, "Oh, by the way, isn't it raining heavily, the manhole has been washed clean, even if you go down, you won't find anything, there is no need to go down." In my opinion, the fluff you have just extracted is the key, as long as it can be proved that it was scraped off the clothes of the deceased. ”

"I think it's better to go down, it's more appropriate," At this time, another person's voice came from behind him, Jiang Chenghuan didn't look back and knew who the person who spoke was, it was Qi Yin, "Although there was a heavy rain during this period, there is another possibility that cannot be ignored, that is, the fluff is not left on the body of the manhole, but on the murderer, so it is not enough to prove that the body was thrown from here, there are loopholes, perhaps, go down to the manhole, you can have an unexpected gain on the wall of the manhole, and save rework." ”

Hehe, what a good cause, there are really two brushes, and when it is critical, Jiang Chenghuan will be embarrassment. He knows this guy's temperament very well, and when it is critical, if he doesn't play a little famous, it's not his style, it's a nasty guy. But this time, objectively speaking, he has both a difficult and a reasonable element, and there is no doubt that the situation he is talking about exists, and the evidence must form a chain of evidence, and it would be great if the residue could be collected on the wall of the manhole. His work can be said to kill two birds with one stone. Oh, no, it should be three birds with one stone, because, if he Jiang Chenghuan goes down, he Zhang Kehua wants to go down at the same time, trace inspector, there are traces of fluffy enemy detectives, how can he not go down. He laughed at them as he thought of it.

"What Mi Yin said makes sense, I'll go down first," he said, and then stretched out his foot to lean down, and at the same time, turned around, deliberately looked at Mi Yin and asked in a very sincere tone, "If there are traces of fluff, how can the inspector determine that there are no traces?" ”

Qi Yin reacted so quickly, all the people who are ghosts and goblins are quick people, he immediately turned his gaze to Zhang Kehua, but he didn't squeak, it depends on how you Zhang Kehua reacts.

Sure enough, Zhang Kehua's upright personality was shown again.

"Hey, don't you just let me go, go down, just go down, what's so difficult about this," Zhang Kehua said, he had already taken a step, and when he saw that Jiang Chenghuan was still blocking the manhole, he shouted, "Go down quickly, good dogs don't get in the way." ”

Jiang Chenghuan was unmoved, and held the mouth of the manhole with a thoughtful expression.

"What's wrong with you, don't you dare to go down," Zhang Kehua put his hands on his shoulders and made a gesture to push, "If you don't go down, I'll push, but be careful." ”

"If we find fluff, or some traces, can we say that we can't chisel it off, how can we preserve it?"

Zhang Kehua's hand that was about to be strong loosened, turned around and shouted at Qi Yin, "You, you go down with us to take pictures." ”

Zhang Kehua yelled at Qi Yin in a rough voice.

It's really a thing to drop a thing, not to mention, although Miyue is a ghost and a ghost, he can't help Zhang Kehua, he didn't say a word, and shouted at Zhang Kehua, "What the hell is your name, you two are stuck here like dead corpses, how can I go down?" ”

"You're just dead, and you didn't forget to grab a life-saving straw when you're dying, hum!" Zhang Kehua was stupid, and put a slight force on Jiang Chenghuan's shoulder.

Ahh

Suddenly there was a scream.