Qu Zaichen glanced at Old Madam Lu, Lu Shangwen, and Mrs. Lu, and couldn't help but sigh secretly, although he couldn't bear it a little, he still said calmly: "In fact, in the last four murders, Yu Zhenzhen was suffocated to death at home, and then Jin Hui was poisoned to death at home with arsenic on the second night, Lu Suyun broke his skull and died on the third night, and Yan Lin was stabbed to death on the fourth night. The last three murders were all caused by the death of Yu Zhenzhen, the first case. ”

When Mrs. Lu, Mrs. Lu Shangwen, and Mrs. Lu heard this, they all seemed to be moved, and they were all even more puzzled, their eyes widened, extremely frightened and curious, staring at Qu Zaichen.

Qu Zaichen glanced at Feng Ning and said, "I saw through the whole thing, because of Miss Feng Ning's words. ”

When Feng Ning heard it, he was surprised, and when he raised his eyes and met Qu Zaichen's gaze, Mo Ming lowered his head in shame.

Qu Zaichen continued: "Miss Fengning said yesterday that the arsenic bottle in her room seems to have been touched, I sent someone to find Miss Fengning last night to borrow the medicine bottle, and when I came back to check, I learned that the medicine bottle was no longer filled with arsenic, but flour, and someone changed the arsenic.

So who swapped the arsenic and what was it used for? If it is a medicine rat medicine cat, it does not need to be sneaky, it is most likely used to kill people, and I immediately thought of Jin Hui's death. So who is the arsenic that the Lu family replaced? Miss Fengning said that if the servants of the Lu family needed medicine rats, they could directly ask her to get medicine, and it was difficult to verify whether the arsenic was used to medicine rats or kill people. Even if all the servants of the Lu family want to use arsenic to kill people, they can pretend that the medicine rats use it, and directly ask Miss Fengning for arsenic, so they don't have to go so hard to cover it up.

And the master of the Lu family is different, the master of the Lu family usually doesn't care about the trivial matter of the medicine rat poison cat, and suddenly asks Feng Ning for arsenic, which will inevitably arouse suspicion. When you go to the pharmacy to buy arsenic, you need to leave your name, and you can't meet the doctor at any time when you go to the street, not to mention that you have the intention of killing, and you are even more weak-hearted, so it is not surprising to come up with a plan to steal the beam and change the pillar. And Jin Hui's residence, there are two hundred taels of silver that he extorted from others, and it is not something that a servant can take out casually, so I deduce that the master of the Lu family is most likely to exchange arsenic and use it to poison Jin Hui. I just don't know who did it?

We previously deduced that Jin Hui was killed because he saw the real murderer who killed Yu Zhenzhen and wanted to blackmail the murderer to get money, but he was killed by the real murderer. According to Yu Zhenzhen's words and deeds before her death, it is inferred that the real murderer of Yu Zhenzhen is very likely to be the biological father of the child in her womb, so the first person I thought of was Lu Shangwen. But the night before Jin Hui's death, Lu Shangwen sprained his ankle, and I confirmed with Dr. He that on the night of the sprain, Lu Shangwen would walk with crutches and pain, and if he insisted on walking, he might not be able to reach Jin Hui's house. Dr. He also said that Mrs. Lu went to the doctor the next night because she was tired and had fetal gas. The Lu family is also a big family, the family has no worries about food and clothing, and there are many servants, what kind of work does it make the pregnant Mrs. Lu tired? What worries her? I immediately thought that the Lu family was some distance from Jin Hui's house, and if Mrs. Lu secretly went out through the back door in the middle of the night, walked to Jin Hui's house, poisoned Jin Hui, and then walked back to Lu's house, then her fatigue and worry would be explained.

These are just my inferences, and Mrs. Lu's words have confirmed that Mrs. Lu did go to Jin Hui's house that night. Qu Zaichen looked at the pale Mrs. Lu and said: "Mrs. Lu, the arsenic of the Lu family was replaced, you appeared at Jin Hui's house that night, and Jin Hui was poisoned by arsenic and died the next day, and you can be convicted by these officials." ”

Mrs. Lu's face turned even paler, her hands clutched her dress, and her body was slumped against the stone table so that she did not fall.

Old Madam Lu looked at Lu Shangwen and Mrs. Lu back and forth, as if she had great doubts, hesitated, did not ask, and turned her head to look at Qu Zaichen.

Qu Zaichen continued: "Why did Mrs. Lu poison Jin Hui? Previously, we deduced that Jin Hui was killed when he saw the real murderer of Yu Zhenzhen, but Mrs. Lu was six months pregnant, and I confirmed with the servants of the Lu family that Mrs. Lu did not know martial arts, how did she kill Yu Zhenzhen, let alone after killing Yu Zhenzhen, she also moved Yu Zhenzhen's body and hung her on the beams of the house? We also deduced that the real murderer of Yu Zhenzhen was very likely to be the biological father of the child in her womb, so I speculated that Mrs. Lu was helping people to kill the mouth of Jin Hui for her husband Lu Shangwen..."

"You spew blood, Shang Wen has always been well-behaved and duty-bound, how can you kill people, let alone have anything to do with that Yu Zhenzhen, who doesn't know that she is a water-based poplar woman, Shang Wen has always been clean and self-conscious, how can he have anything to do with her, Qu Er Gongzi, I know that your family is powerful, and you can't bully us small people at will, right?" Old Madam Lu said angrily.

Qu Zaichen looked at Old Madam Lu and said calmly: "If Old Madam Lu has any objections, there is a chance for you to defend yourself in the court, why not listen to Zaichen's inferences at this moment, don't you want to know the cause and effect of the matter?" After all, the most tragic person in this series of murders is the old lady. ”

Old Madam Lu heard that Qu Zaichen meant something, her eyes trembled and she couldn't speak.

Qu Zaichen looked at Lu Shangwen and continued: "I speculate that Lu Shangwen is the murderer of Yu Zhenzhen, and sent someone to ask the servants of the Lu family, the clothes that Lu Shangwen was wearing on the day Yu Zhenzhen was killed, the servants of the Lu family all said that Lu Shangwen wore a dark brown robe that day, but unfortunately we did not find the robe in Lu Shangwen's closet, or the Lu family, according to Miss Fengning, on the second day of Yu Zhenzhen's killing, she smelled the smell of burning in your room, you burned the clothes, Lu Gongzi is really cautious?" ”

Lu Shangwen's face turned pale and said: "I don't know what you're talking about, I didn't kill that Yu Zhenzhen, I don't know her at all." ”

Qu Zaichen said disapprerovitically: "Even if we find your brown robe and find the scratches on it, because there is no silk thread left on your shirt in Yu Zhenzhen's nails, the government can't convict you for this, you know this yourself, right?" You burned that robe just because you were afraid. But you forgot one thing, you passed through the foundation of the house that the Chang family was building that night and entered the courtyard of the Chang family. In order to prevent termites, Changjia sprinkled a lot of medicinal powder on the base of the trough, which was unique to Dr. He of the Natural Medical Center. And you burned your clothes, but you didn't burn your boots, coincidentally, you didn't wear those boots again in the past two days, and there are still a lot of medicinal powder residues on the soles of your boots, if Lu Gongzi can't tell where the shoes are contaminated with those medicinal powders, that is the evidence of killing Yu Zhenzhen. ”

Lu Shangwen: "You don't bluff me, I didn't see the soles of my boots stained with medicinal powder?" ”

Qu Zaichen: "The powder is earth-colored, with a hint of sweet medicinal taste, Dr. He said that it is easy to confuse termites and effectively poison termites. ”

Lu Shangwen's eyes were desperate, and his hands couldn't help but tremble.

Qu Zaichen continued calmly: "Let's talk about the case of Lu Suyun's murder, where Lu Suyun died, there were slip marks on the road, wooden beads on the ground, and blood stains on the rockery, Lu Suyun died because of a broken skull, and the shape of Lu Suyun's head wound matched the shape of the rockery bloodstains, it was indeed like she accidentally stepped on the beads, slipped and threw herself forward, and her head hit the rockery and died." But there is another situation that will also make her slip under her feet and hit the rockery, that is, she was pushed from behind. ”

When Mrs. Lu heard this, her body trembled violently as if she had been stabbed by something.

Qu Zaichen couldn't bear it slightly, paused for a moment and continued: "Miss Fengning said that when Lu Suyun had an accident, she was next to the lotus pond opposite the rockery, she heard Lu Suyun screaming, looking for prestige, and seemed to see a black shadow flashing by the arch not far away. If Lu Suyun was pushed by that black shadow before hitting the rockery, then who is this black shadow and who wants to kill Lu Suyun? At that time, Lu Suyun's maid and the people from the dart bureau were still outside the Lu family's door, and they heard Lu Suyun's exclamation, so they rushed over together, naturally it was not the people from the dart bureau who killed Lu Suyun. Lu Fuzhong did not lose any property, and no traces of outsiders were found. Therefore, that black shadow should be a member of the Lu family, and I immediately thought of a Lu family member whose words and deeds were abnormal. Qu Zaichen looked at Mrs. Lu: "That person is Mrs. Lu." ”

Lu Shangwen, Mrs. Lu, and Feng Ning looked at Mrs. Lu in shock, Lu Shangwen and Mrs. Lu were so frightened that they seemed to have forgotten their fears, Old Madam Lu clenched her hands, lowered her head, and did not speak.

Qu Zaichen continued: "Miss Fengning said that Old Madam Lu rushed to Lu Suyun's side and learned that Lu Suyun was dead, so she hugged Lu Suyun and kept saying sorry. But why did Mrs. Lu say sorry to Lu Suyun? Miss Fengning guessed that Mrs. Lu should have seen the wooden beads next to Lu Suyun's corpse, thinking that Lu Suyun stepped on the wooden beads, so she accidentally fell and died, because the wooden beads were broken by the bracelet and rope of the old lady Lu during the day and scattered on the ground, so Mrs. Lu thought that she had no intention of killing her daughter, so she hugged Lu Suyun and said sorry.

If the wooden beads were really scattered on the ground unintentionally by Old Madam Lu, and if Old Madam Lu really saw the wooden beads next to Lu Suyun's corpse that night, it would be reasonable to speculate. But if Lu Suyun really stepped on the wooden bead and slipped it, then, the wooden bead was drawn by the sole of Lu Suyun's shoes, and it would definitely be far away from Lu Suyun's body, and we also found the wooden bead at the place where Lu Suyun died, a meter away, even if Yan Neighbor was holding a torch at the time, it was difficult to see the gray-brown wooden bead on the ground in the distance at a glance, right? And Mrs. Lu just learned that her daughter died unexpectedly, she was flustered and grieving, and she would only pay attention to Lu Suyun, and would not care about whether there was a bead on the ground first, right? If Old Madam Lu didn't see the gray-brown wood beads on the ground, why did she keep saying sorry to Lu Suyun? What is she sorry for Lu Suyun?

I guessed at the time that Mrs. Lu was the black shadow, and it was she who pushed Lu Suyun, causing Lu Suyun to die twice. Miss Fengning also said that when Lu Suyun screamed, she was squatting by the lotus pond, she heard the scream, and then stood up, the black shadow was already at the arch, Lu Suyun's accident was more than ten meters away from the arch, such a short time, it is difficult for ordinary people to reach the arch so quickly, unless that person has learned martial arts. Today, Mr. Chen Fei mentioned that Mrs. Lu was born in a dart bureau and learned martial arts, which further confirms my speculation.

But why did Mrs. Lu kill her own daughter? According to Chen Fei and Yan Lin's words before his death, although Mrs. Lu did not agree with Lu Suyun marrying Yan Lin before, and their mother and daughter had quarreled many times, but now Mrs. Lu has slowly accepted Yan Lin, and Mrs. Lu has always doted on Lu Suyun, and their mother-daughter relationship has been restored as before. Lu Suyun was anxious to go back to the Lu family alone, wanting to see Mrs. Lu earlier and surprise Mrs. Lu, so she knew that their mother-daughter relationship was very close. Therefore, Mrs. Lu had no reason to kill Lu Suyun. Moreover, even if Mrs. Lu killed her daughter for some reason, she should not hold Lu Suyun's corpse and say nothing, causing others to suspect and even faint in grief.

Therefore, I speculate that Mrs. Lu's killing of Lu Suyun should be an unintentional move. Maybe Mrs. Lu had the intention to kill someone, but she had no intention of killing her own daughter by mistake, so who was the person Mrs. Lu wanted to kill that night? When it was dark that night, why did Mrs. Lu kill people without identifying the identity of the person she killed? ”