Section Chief Liao arranged Fang Yu and Li Shuhan to work in the conference room of the Criminal Investigation Department and went to the meeting by himself.

Due to the limited time and the fact that Section Chief Liao was so cooperative, Fang Yu didn't have time to worry about anything with him.

After taking the case file, Fang Yu first carefully read the transcript of Li Xiulian's confession, the basic content was similar to what Li Shuhan said, but there were some details that she did not mention.

For example, Li Xiulian found that Zhen Dan seemed to have some mental problems, and Zhen Panpan didn't seem to like Zhen Dan very much.

But just disliking it shouldn't be a reason for Zhen Dan to kill people.

Fang Yu then read Zhen Dan's confession.

Judging from the transcript, Zhen Dan is really as Li Shuhan said, with a wooden and taciturn personality, often when the police ask several questions, he will answer one, and the content of the answer is very simple, and sometimes some answers are not what he asked.

Fang Yu felt that this Zhen Dan's condition was very wrong, not quite like it was caused by excessive sadness or fright.

Next, Fang Yu looked at the photos of the scene taken by the Criminal Investigation Department, the photos of physical evidence, and some of Zhen Panpan's autopsy reports.

There are many items that need to be examined in a complete autopsy report, and some special items will only be carried out with the consent of the victim's family, after all, some examination methods are destructive.

The current autopsy report does not clearly indicate the cause of Zhen Panpan's death, and it can only be determined that it was not caused by external injuries.

It is stated in the report that Zhen Panpan had multiple abrasions on his body and a blow injury to his head, but according to the situation at the scene, it should have been caused by the victim in severe pain and not from others.

The autopsy has not yet been performed, but some of the contents of the stomach have been taken for analysis based on the available clues.

Zhen Panpan's stomach contains undigested dog meat, eel and other substances, but no special toxic substances are found except for the harmful substances produced by the natural fermentation of undigested food in the body.

The test results are very consistent with Li Xiulian's confession, and they also confirm Fang Yu's previous inference that the cause of Zhen Panpan's death has nothing to do with food poisoning.

But on the other hand, there is a conflict with a previous test report.

Li Shuhan had said before that the Criminal Investigation Department took two samples from the teacup that Zhen Dan used to feed Zhen Panpan with water and sent them for testing.

The test results showed that the residual liquid in the cup contained a large amount of vitamin C, and a bottle of vitamin C pills was later searched in Zhen Dan's room.

At the same time, the dried vomit on the teacup was tested for trivalent arsenic that exceeded the normal index, which made Fang Yu very puzzled.

Zhen Panpan's stomach did not find that the trivalent arsenic exceeded the standard, which Fang Yu had long expected, vitamin C and shrimp could not produce so much trivalent arsenic.

But if it weren't for the fact that Zhen Panpan didn't have pentavalent arsenic in his stomach, where did the trivalent arsenic in his vomit come from?

Fang Yu rummaged through the information in the dossier, and there was no information about any containers or items containing trivalent arsenic found in Li Xiulian or Zhen Dan's room.

Of course, it is also possible that they were discarded after being used up, although Fang Yu felt that judging from the performance of Li Xiulian and Zhen Dan, the possibility was not high, but it could not be completely ruled out.

Fang Yu finished reading the file, closed his eyes and thought quietly.

Li Shuhan kept staring at Fang Yu, hoping that he would make some new discoveries.

In fact, Fang Yu's mind was also a mess now, and he didn't figure out a clue.

Li Xiulian, who was the first to surrender, was the most motivated suspect to kill, but the method she thought she killed was actually a false misinformation, and the test report also proved that the dishes she cooked did not produce any toxicity.

At present, Zhen Dan, who is the most suspect, has no motive to kill at all, and judging from the transcript of his confession, he seems to be indifferent to the whole thing, not at all like a person who has just killed his father.

And the inconsistencies in the test report are not enough to support the murder charges against him.

The more Fang Yu thought about it, the bigger he became, he always felt as if he had missed some clues, but he couldn't remember what it was.

Fang Yu opened his eyes, looked at Li Shuhan's nervous and expectant expression, and smiled bitterly in his heart, but he still said quietly on his face:

"I want to meet Annette Li and talk to her again."

Li Shuhan let out an "oh", and immediately looked for the Xiao Lu who was explained by Section Chief Liao before, and asked the Criminal Investigation Department if she could arrange for her and Fang Yu to meet Li Xiulian.

Xiao Lu didn't make it difficult for them, and agreed very happily.

After a while, Li Xiulian was taken to the interrogation room of the sub-bureau, and Fang Yu did not rush in to talk to her, but stood outside, carefully observing her through the one-way transparent glass.

When Li Xiulian was brought to the interrogation room, she was wearing the orange prison uniform of the detention center, she was about 1.6 meters tall, and she walked very slowly and seemed to be tired.

When she sat down, Fang Yu found that her expression was sad, and there were vague tear stains.

Judging from the dossier, Li Xiulian is only in her early thirties, but she looks a little older than her actual age, which is estimated to be due to long-term labor and no maintenance.

But even so, Li Xiulian still looks charming, especially because she seems to be born with relatively white skin, which is very tempting for many men.

Fang Yu guessed that Zhen Panpan fell in love with Li Xiulian at the beginning, not only because she was simple and hardworking, but also because of her appearance.

Li Xiulian sat quietly on the stool in the interrogation room, staring at her hands, but she didn't seem to be looking at anything.

Fang Yu looked at her for five minutes, and she just sat motionless for five minutes.

Fang Yu felt some sympathy for this woman, but what should be done still had to be done.

He took Li Shuhan into the interrogation room and sat opposite Li Xiulian.

"Annette Li, I brought you here today to learn some information about your case, you have to answer well, you know?" Li Shuhan spoke first according to the procedure.

Li Xiulian raised her head slowly, the focus in her eyes seemed to be found after a while, and she said the word "ah" in a little confusion.

Fang Yu motioned for himself to ask questions, and Li Shuhan closed his mouth and sat patiently.

"Annette Li, hello, I have a few questions for you, these questions are related to the truth of this case, I hope you can answer them truthfully, okay?"

After waiting for a while, Li Xiulian nodded silently.

"Li Xiulian, you said that Zhen Panpan would beat you when he was drunk, did he do this often or occasionally."

Li Xiulian thought about it, and replied slowly in a hoarse voice, "Not before, but later in Shudu, I occasionally did, but since I started playing mahjong with those people, as long as I lose money, I will be beaten." ”

"What was Zhen Dan doing when Zhen Panpan beat you." Fang Yu continued to ask.

"Zhen Dan is a quiet and timid child, as soon as his father drinks, he will speak loudly, and he will hide in the back room and not come out." Speaking of children, Li Xiulian's expression became a little more vivid.

"On the day Zhen Panpan died, did he eat with you?"

As soon as she mentioned this topic, Li Xiulian's face darkened again.

Yes, but as soon as he saw his father drinking, he hid in the back room and refused to come out. Later, it was Si Nuo who brought the rice in and gave it to him. ”

"Snow!"

Li Xiulian's words woke up Fang Yu at once, there is another key person in this case, that is, Li Xiulian's daughter Sinuo.

Li Xiulian was determined to kill Zhen Panpan because he tried to violate Sinuo.

Si Nuo was also present on the night of Zhen Panpan's death, but in the case file, Fang Yu did not see the interrogation record about Si Nuo.

Why such a key person was missed, Fang Yu felt very strange.

Fang Yu talked with Li Xiulian for a while, and after carefully understanding Zhen Panpan's usual living habits and the relationship between several people in the family, he asked Xiao Lu to bring people back.

Seeing that the time was not early, Fang Yu still had to go back to the noodle shop to open for business, so he had to ask Li Shuhan to find Li Xiulian's daughter Sinuo first to make an interrogation record.