Du Shu was also a little surprised when he saw Yang Jing find the pit on the grass, because it can be seen that Yang Jing has found a clue!

"What did you find?"

Faced with Du Shu's question, Yang Jing did not answer, as if he was immersed in his own world.

Yang Jing stood up, measured it with his footsteps, and after about three or four steps, he saw a similar pit, but it was not in the same straight line as the previous one!

Seeing this, Du Shu couldn't help but feel a tightening heart, and with a flash of inspiration, he said to Yang Jing: "This person is stepping on stilts!"

Yang Jing glanced at Du Shu, couldn't help nodding, the two walked forward for a while, and sure enough, in the grove behind the post house, they found two bamboo poles, and a branch was deliberately left on the bamboo pole, and there were mud spots on the branches, so it can be seen that the person stepped on this bamboo pole and came to the window, so he didn't leave footprints!

"My lord, this person can walk with this bamboo pole, and his skills must be extraordinary, why don't you sneak in with the light, but deliberately cover up your footprints?" Although Du Shu asked, he also had another doubt in his heart.

Judging from this person's modus operandi, he should be a cruel and vicious person, why is he so jealous that he doesn't even leave footprints?

Generally, this kind of person can provoke Yang Jing in the open, which means that he is an arrogant maniac, and he is not afraid of Yang Jing's investigation at all!

"He's testing me!" Yang Jing said, this person took so much pain, either he deliberately covered up people's eyes, or he was really testing Yang Jing with a problem.

However, Yang Jing already had a picture in his mind about how Ding Ding's killer entered and exited the room, so he asked Du Shu's people to wrap their hands in a handkerchief and take the bamboo pole back, hoping to be able to extract fingerprints on it.

Du Shu asked a little puzzled: "My lord, even if he stepped on the bamboo pole and left no footprints, but the window was intact and bolted from the inside, how did this person enter the room?"

Yang Jing asked rhetorically, "Are you sure that the window is intact?"

When Du Shu heard this, he was also stunned, and hurriedly walked to the window, remembering that Yang Jing was checking the window frame, and at this time he also pushed the window frame, but found that the window frame was loose!

Yang Jing walked over, knocked on the window frame, and then said to Du Shu: "According to the mindset of ordinary people, after the window is bolted from the inside, the window cannot be opened, but Du Tixing, you take a closer look, this window is not made of nails, the window frame is fixed with wooden tenon and wedge, as long as the wooden tenon is pulled out, the entire window frame can be removed!"

This is an experience that Yang Jing has gained in later generations.

In later magic shows, there is a kind of magic trick called water tank escape, or escape technique, in which a large iron lock is hung on the box, and the key is lost, and it seems that it cannot be opened at all.

But the fact is, you don't need to open the lock at all, because this lock is a hidden distraction, the nail between the lock and the box is loose, just pull out the nail, you can remove the whole lock, or the mechanism is on the lid of the box, the lock can not play the role of closure at all!

It was this inspiration that Yang Jing thought of this section, the deadbolt in the window can't play its role at all, because he can directly remove the entire window frame, and everyone's attention is focused on the window bolt, who would have thought that there is a problem with the window frame?

"If that's the case, then this person must come to the post house early to touch the window, and only need to interrogate the post keeper, who is staying these days, or close to this room, and he will be able to find clues!"

Du Shu said excitedly, and couldn't help clenching his fists!

However, Yang Jing shook his head and said to Du Shu: "He doesn't necessarily go out in person, and he doesn't even need to use someone to do it, this person doesn't even want to leave footprints, so he shouldn't make such a big mistake and flaw." ”

Du Shu was excited about the new clues, where was he willing to let go, and immediately called Yicheng over, but unfortunately after some inquiry, it was really as Yang Jing said, because he knew that the imperial court was coming, so he cleaned it a few days earlier, but no one touched this window.

Because it rains these days, I am afraid that the rain will spill into the house, and the window bolt has long been broken, and the post house is not manpowered, no one repairs it, so I nailed the window to the door for convenience.

There are no more people to call in the inn, so there are only a few old mothers to do these rough and dirty work, these old mothers are timid people, whether they are lying or not, you can see at a glance.

Yang Jing didn't mean to laugh at Du Shu, took Du Shu to the room, and after searching around, he finally stopped in front of the window.

Du Shu lagged behind for a while, touched his chin and pondered, and seemed to have figured it out at this time, and said to Yang Jing: "My lord, could it be that this person stepped on a bamboo pole to the window sill, and then pulled out the wooden tenon, and thus entered the room?"

"But in this way, the movement will be very big, and it is impossible for the Cave True Dao Master not to find out!"

Yang Jing squatted down, pointed to a handful of ashes on the ground, and said to Du Shu: "Du Tixing, let's see what this is?"

Du Shu bent down to look, his eyes lit up, and he picked up the ashes and rubbed them: "It's grass ash?"

"It's supposed to be the ashes left over after the papyrus has been burned. Yang Jing corrected.

"What do you do with the ashes of the papyrus?" Du Shu was a little puzzled, while Yang Jing pointed to the small incense burner on the table.

Du Shu walked to the small incense burner, lifted the lid of the stove, and a stream of mugwort incense rushed in!

Yang Jing said to Du Shu: "This person must have soaked the papyrus with **, and after it is dried, just light the papyrus, and a lot of smoke will be produced..."

Du Shu is a spirit, as if everything is connected!

"Yes! These days are cloudy and rainy, the house is damp, a little mugwort can dispel the wind and cold, and it can also dry the moisture in the house, this person must be taking advantage of the mugwort to cover up the smell of **!"

"But the window has been sealed, how did he throw the papyrus in? The smoke emitted by the papyrus can indeed charm Dong Zhen, but as long as he pulls out the wooden tenon and removes the window frame, Dong Zhen will notice it!"

"If you didn't pull out the wooden tenon, then where did this papyrus come from?" Du Shu muttered to himself, subconsciously glanced at Yang Jing, but saw that Yang Jing kept smiling.

Du Shu's frowning brows suddenly relaxed, pointed to the hole in the beam, and said excitedly: "Ha! Everything makes sense!"

"In the dead of night, this man approached the window with a bamboo pole, lit the papyrus, threw it through the vent, and after fascinating Dong Zhen, he pulled out the wooden tenon, entered the room, and committed murder against Dong Zhen, and then put the window back on!"

Although this process was only reached after Yang Jing's constant reminders and hints, Du Shu still had a great sense of achievement, as if the murderer was testing Yang Jing with difficult questions, and Yang Jing kept asking questions to test him Du Shu, and finally came up with the answer!

However, Yang Jing shook his head and said, "The process is almost like this, but there is a doubt. ”

Du Shu saw that Yang Jing did not agree with his point of view, and he was inevitably a little disappointed, a little discouraged, and naturally a little unconvinced, because in his opinion, the murderer was seamless, and he deliberately arranged this scene, which was a case he had never seen before!

And Du Shu followed Yang Jing, peeling off the cocoon all the way, and came to this conclusion, which should also be impeccable!

"What doubts do you still have?" Du Shu suppressed the displeasure in his heart and asked Yang Jing.

Yang Jing slowly stood up and said to Du Shu: "If that person comes to the window with a bamboo pole, even if he doesn't pull off the wooden tenon, it will still arouse Dong Zhen's vigilance, because the wall outside has no focus point, if you want to stand firm, you can only lean against the wall, the movement is still too big, and besides, Dong Zhen has practiced internal strength since he was a child, and his spiritual sense will be more acute than ordinary people." ”

When Du Shu heard this, he couldn't help but feel that Yang Jing had some strong words, this murderer acted quickly and was extraordinary, and if he wanted to approach quietly, it should not be a problem, Yang Jing's suspicions were somewhat far-fetched.

"Is it because of the process of me pushing out the case, which made him unhappy? This Yang Jing is not like such a person..."Du Shu thought in his heart.

Yang Jing seemed to see through Du Shu's thoughts, and said to Du Shu: "Du Tixing, let me ask you, how to explain the saliva and plum blossom marks on the window frame outside?"

When Du Shu heard Yang Jing's question, he couldn't help but fall into deep thought, wondering why that person left these two traces that seemed unrelated.

But he couldn't figure this out after all, so he had to shake his head and say to Yang Jing: "Then how does Lord Yang think that person came in?"

Yang Jing looked up at the beam of the room, and said slowly: "It's very simple, that man raised a monkey, let the monkey climb through the window to the vent, and sent the papyrus into the room, if it was the papyrus he threw in, he didn't dare to guarantee that the papyrus would not fall out, or ignite other things in the room..."

"Monkey?" Du Shu seemed to have a hole in his head, if he was replaced by someone else, he might question, is there such an obedient monkey in this world?

But Du Shu is a general, in Jiankang Mansion has also enjoyed the glory and wealth, the Song Dynasty people are the most proficient in eating, drinking and playing, domesticating pets is also all the rage, talking about leopards and other fierce beasts, there are not a few monkeys.

These rich and noble families will specially hire old hunters in the mountains to domesticate monkeys, not to mention throwing a papier, that is, dressing themselves and eating with chopsticks, these monkeys can do it!

No wonder the plum blossom-like imprint is so familiar, and now it seems that it is really a monkey!

"But the monkey's squeaky chirping, isn't it more conspicuous than the man's own hands, and the movement is even bigger? It is really impossible for the hole not to be noticed!" Du Shu raised his own question, in his opinion, Yang Jing's speculation about the monkey is indeed reasonable, but there are also big loopholes.

Yang Jing smiled and said, "Which monkey have you ever seen that drools?"

Yang Jing didn't wait for Du Shu to answer, and continued: "In order to prevent the monkey from making a sound, this person sealed the monkey's mouth with something like a mouth title, which caused the monkey to drool constantly. ”

"This inn is old and in disrepair, even the windows are nailed, and even if Dong Zhen hears the movement, he will not think it is a monkey, but only think that it should be an old cat. ”

"Moreover, the wooden tenon on the window was not pulled out by the murderer, but pulled out by the monkey, if Du Tixing looked carefully, he would find that the wooden tenon and the edge of the tenon and groove were scratched, and the man did not use tools to pry, he could not pull out the wooden tenon, but the monkey's paws could!"

As soon as Yang Jing said this, Du Shu finally saw the whole picture of the entire murder process clearly.

The monkey crawled in through the vent, put down the papyrus, and then went out through the vent, and when he was so captivated that he obeyed his master's command, he pulled out the wooden tenon and removed the window frame, and the murderer stepped on a bamboo pole and swung in through the window, and his feet did not even need to step on the windowsill!

When the killer cut the hole open and went back the way he came, who would have thought that someone would use the monkey as an accomplice?

Yang Jing saw that Du Shu was a little depressed, so he said to Du Shu: "Du Tixing, in this Anfeng military city, there are few people who can raise monkeys so finely, I'm afraid there are few people, right?"

Du Shu's eyes lit up suddenly, as if he already had a candidate in his heart, and immediately regained his fighting spirit, and said to the people around him: "Cheer up and follow this official to get people!"