For the murderer's purpose, Mumu police department guessed that it was to create a secret room to confuse the police, but Bai Yan Zhenyu's intuition reminded him that it would never be so simple.

At dusk, the police department turned its eyes and noticed that a piece of glass on the French window was broken. He quickly asked, "what's the matter with this glass?"

Baiyan Zhenyu recalled the previous scene and explained: "in fact, after the discovery of the body, Mr. Yingting punched Mr. Ju Ren because Mr. Ju Ren said some inappropriate words, which made Mr. Ju Ren break the glass."

Conan observed the scene very carefully. He picked up a piece of glass with a handkerchief and reminded him, "look, there is a small hole in the piece of glass."

When they looked carefully, they found a man-made small hole on it. According to the position, it was very close to the window frame.

After seeing this small hole, Bai yanzhenyu and others who often encounter secret room cases suddenly associate with the role of the small hole, that is, using props such as thin wire and transparent tape to close the door lock from the outside, so as to disguise the scene as a secret room.

"If the killer escaped from here, there may be clues left on the balcony. Let's look for them together."

Baiyan Zhenyu pushes open the French window, and Conan go to the balcony outside, carefully looking for the clues left by the murderer.

A few minutes later, Bai Yan Zhenyu's eyebrows frowned tightly, because there was no clue on the balcony.

Just then, the forest garden owner came over, looked at the body of the housekeeper chongsong, and sighed: "Mumu police department, when are we going to put the body of brother chongsong like this? He is a good friend of my wife and I. If I can, I hope to handle the post affairs for him as soon as possible so that he can be buried next to my wife's grave."

Mu Mu's police department understood the master's mood very much and refused with an apologetic face: "I'm very sorry, master, we have to wait until the end of the judicial settlement."

"Well, that's a pity." after learning that this is the relevant regulations of the police, the forest garden owner didn't force it.

Looking at the back of the forest garden owner leaving, Hattori whispered: "so it seems that what my mother said is true..."

"Hmm?" Bai Yan Zhenyu asked curiously after hearing the service department's muttering, "service department, what are you talking about?"

"My mother said that Mrs. moriyuan, who died four years ago, liked uncle chongsong at the beginning. Mrs. moriyuan came back to moriyuan's house to see uncle chongsong. Unexpectedly, Mr. moriyuan mistakenly thought Mrs. moriyuan was interested in him and pursued Mrs. moriyuan."

"Although Mrs. moriyuan was confused about this, her parents agreed with the marriage. Finally, Mrs. moriyuan softened Mr. moriyuan's enthusiasm and chose to marry Mr. moriyuan."

Without concealing anything, Nobu told the secret gossip of Senyuan family to Bai Yan Zhenyu and Conan.

"Listen to you, the relationship between Mrs. Mori and housekeeper chongsong is very suspicious..."

Speaking of this, Bai yanzhenyu thought of a possibility and guessed, "do you think it would be the same between Mr. Yingting and miss piantong with the same style necklace?"

"This... Is very likely."

After Bai Yan Zhenyu's reminder, they also noticed something wrong, because piantongfeng, as his fiancee, didn't show much happiness and intimacy in the face of senyuanju people.

"Well, let's stop talking about these things..."

Conan observed the environment around the balcony and suggested: "since we haven't found the clue left by the killer for the time being, let's try whether we can escape from this balcony. As for the method, we should jump from here to the balcony on the next floor and then escape from that room."

"Yes, I'll try." Bai Yan Zhenyu rolled his sleeves and was ready to turn over from the balcony to test it himself.

"No, brother Zhenyu, your skill is too good to test."

Seeing this, Conan quickly stretched out his hand to stop Bai yanzhenyu. After giving the reason, he looked at nobuji with a smile.

“......”

Sakurai understood Conan's idea in an instant. He looked at Conan speechless and couldn't help rolling his eyes, but he took the task actively.

Under the protection of the rope found by Baiyan Zhenyu, Hattori made use of the protruding balcony and eaves, and easily landed on the balcony on the next floor, which proved the feasibility of this escape method.

Just as the service department was preparing to return to the scene, it suddenly found something in the crown of a big tree in the distance and said in surprise, "what's that? It seems that something is hanging on the tree."

"Hmm? I'll have a look."

Bai Yanzhen's eyes were shining. Taking the railing of the balcony as the springboard, he jumped directly onto the big tree.

After falling on the tree, Bai yanzhenyu soon saw what he said and found that it was a neatly wrapped blood stained shirt with a pair of blood stained gloves, a blood stained knife and a thin thread with transparent tape on the top.

"This is the murder weapon and the prop used by the murderer... In that case, the murderer may be him, but if it is him..."

According to these items and the information obtained before, Bai yanzhenyu probably guessed the identity of the murderer, but there is still a doubt, that is, how the murderer fled the scene.

Xiaolan, who has been looking at the window downstairs, was startled by Bai Yan Zhenyu's behavior of jumping out of the balcony and shouted discontentedly: "brother Zhenyu, how can you do such a dangerous thing? What if you make a mistake..."

Looking at the angry Xiaolan, Bai yanzhenyu smiled and promised, "I'm sorry, I'll pay attention to safety next time."

"Well, you can't do this next time."

Seeing that Bai Yan Zhenyu knew his mistake and could change it, Xiao Lan's anger eased slightly. She reminded him with concern: "brother Zhenyu, come down quickly. Look at the current weather. It's estimated that it will rain later."

"OK... Wait, rain?!"

Baiyan Zhenyu answered. When he was about to get down from the tree, he suddenly had a flash of light and looked up at the window where the murderer broke the glass.

It is a window divided into two halves. There are half rain windows on the left and right sides to block the rain. The right rain window is closed to block the right half of the window.

"Rain windows, outer rooms without lights, balconies without clues..."

After Bai yanzhenyu connected all the information together, his face showed an expression of sudden enlightenment. The corners of his mouth immediately aroused a confident smile and muttered, "I see. Now the whole case can be explained..."