We watched Qiao Pengju disappear outside the school gate trembling with his relics, his rickety back was full of incomparable desolation, after all, the investigation in the school did not get any useful clues, and when I was going to go back, I heard someone calling me from behind.

When I turned around, I saw Wu Xiao panting and sweating profusely.

"What's the matter?" I asked.

Wu Xiao picked up a pen in his hand, the silver-gray pen style is very unique and exquisite, but my common pen is a little different.

"I heard just now that Nie Bingwan's mother came to retrieve her relics, and I only found out when I got out of class." Wu Xiao handed the pen to me and said with a sad expression. "This pen is Nie Bingwan on the day of the accident, I originally made an appointment to go back to meet her mother together, she suddenly had something to ask me to wait first, when she left, she turned back and handed this pen to me, let me keep it for her first, this is also her relic, I want to return it to her mother, but I came late Her mother has left school, I think she will go to the police station to deal with things, can you please help me transfer it to Auntie."

I glanced down at the pen in Wu Xiao's hand, I have a long love for a boy, I like Nie Bingwan for so long, although they haven't been together in the end, but they can be regarded as a soft spot, now I'm afraid it's rare to see a boy like Wu Xiao, I put the pen in his hand.

"Forget it, you can keep it for yourself, it will be the last gift that Nie Bingwan gave you, and it's okay to leave a thought for yourself when the person is gone."

Wu Xiao bit his lip and nodded silently, carefully put away the pen, as if putting away all his attachments and memories to Nie Bingwan, and turned around and left gloomily.

When we returned to the bureau, we told Nangong Yi everything we learned at school, and Nangong Yi was also shocked that Nie Bingwan's tattoo coincided with the time of her death, and what we learned from Qiao Kewei's father, Nangong Yi looked at us, and her expression was the same as when we first heard it from Qiao Pengju's mouth.

"Do you think that Qiao Kewei may have committed suicide by jumping off the building because she went crazy because she studied Qimen Dunjia without authorization?" Nangong Yi asked Han Yu very seriously.

"There is a possibility, but I don't think it will be too big, Qiao Pengju said that Qiao Kewei has been smart since she was a child, and Qimen Dunjia is broad and profound, ordinary people can't understand it at all, and it is not excluded that Qiao Kewei can read one or two." Han Yu shook his head thoughtfully, and replied uncertainly. "But if you really talk about delving into it, I think I can't reach it with Qiao Kewei's attainments, looking at the Dao talisman she draws, I know that she knows a little about the Dao method, and she shouldn't be too deeply involved in the art of Qimen, and it shouldn't be to the extent that she goes crazy."

"It doesn't matter if Qiao Kewei is crazy or not, if what her father said is true, then Qiao Kewei has always been considered a fallacy before, and it seems untenable to spread rumors to mislead her classmates." Yun Duruo pursed his lips and said meaningfully. "Maybe she really saw something at Hat Tak Medical College, and what came out of her mouth may not be credible."

"What about the diary? Did you find Nie Bingwan's diary? Nangong Yi's attention turned to me after listening.

"No, I didn't find Nie Bingwan's diary in dormitory 403, maybe she put it somewhere else." I took a deep breath and shook my head in disappointment. "There is also a worst result, assuming that Nie Bingwan really has a boyfriend by her side, and this boyfriend must be someone from the school, he may know that Nie Bingwan has a habit of writing a diary, and after Nie Bingwan's death, he was worried that the diary would implicate him, so he took the diary before us, if this is the case, I think the diary has been destroyed."

Nangong Yi nodded after listening, and didn't seem to be too disappointed that she didn't find the diary, and told us excitedly that during the time we went to Hede School, she found a hidden folder in Nie Bingwan's mobile phone before, and it should be that Nie Bingwan didn't want others to see the contents inside, and deliberately added a password.

Nangong Yi asked the technical department to crack the code and found that it was a photo stored inside.

"Our inference is not wrong, Nie Bingwan does have a man who has a very close relationship with her." Nangong Yi handed us a stack of printed photos.

Han Yu and I blushed after just one glance, but the prince was calm, Yun Duruo and Nangong Yi were standing next to us, and the photos in my hand were extremely beautiful, these were some very private photos taken by Nie Bingwan in bed.

Nie Bingwan in the photo is charming and moving, and her dress is quite revealing, which is similar to the two people we know and understand her, and these photos are not taken by herself, but by another person, in a photo we see a man's hand, we can determine that it was a man who took these photos for Nie Bingwan at that time.

Judging from these photos, Nie Bingwan and this man have a very close relationship, and the exposure and scale of the photos make me a little dry-mouthed, especially in front of Yun Duruo and Nangong Yi, I am a little unnaturally embarrassed, and I quickly glanced at it and put it back in the file bag.

"I've looked at each of these photos carefully, and I can't tell the identity of the person who took them except for the hand." Nangong Yi said seriously. "But at least we can be sure that there is someone next to Nie Bingwan who has never appeared in our sight."

"Nie Bingwan kept these photos so hidden, it can be seen that she doesn't want anyone to see them, she left these photos more as a souvenir, which shows that she has a good relationship with this man, but in the photos, this man has never appeared, presumably Nie Bingwan doesn't want people to know who he is." Yun Du thought thoughtfully and said. "The more you hide it, the more problematic it is, why don't you dare to make a good relationship public, Nie Bingwan may also hide other secrets when she hides this man."

"Nie Bingwan has been in school for a long time, and she has very little time to leave school alone, even if she hides the man around her, one thing is for sure, this man must be a person in the school." I rubbed my forehead and walked back and forth a few steps. "Since our inference is correct, then this man must still be in Hede Medical College now, it seems that we have to go back to the school to re-investigate the people around Nie Bingwan."

Nangong Yi nodded, suddenly remembered something, and handed me a report, saying that when I went out, Ling Guodong from the police station came and saw that I was not there to transfer this test report to me.

Because all the evidence from the scene of the previous case had to be handed over, and when Ling Guodong was investigating in the 403 dormitory, he found a box of oral contraceptives in Nie Bingwan's drawer, but some white pills were also found next to it.

The size and shape are the same as the tablets in the oral contraceptives, but the names on these white tablets are blurred, as if they have been artificially rubbed away, this abnormal detail aroused Ling Guodong's suspicions, and he deliberately brought the oral contraceptives and the white tablets next to them back for laboratory testing.

But when the evidence was handed over, the time was too rushed, and the results of the laboratory had not yet come out, and the results were not available until today, so he immediately sent them over.

I flipped through the lab report, and it was the results of the two drugs.

After the test of the tablet extracted from the oral contraceptive, the ingredient in it is vitamin C, I frowned when I saw this, the main ingredient of the contraceptive pill should be ethinyl estradiol cyclopentyl ether, referred to as ethinyl estradiol, which is made of synthetic short-acting progestogen, and vitamin C is impossible to appear in contraceptives.

Another white tablet that has been rubbed off the name of the drug, the main ingredient is still vitamin C after testing.

"Nie Bingwan grinded the name of the vitamin C off the medicine and put it into the oral contraceptive......" I said with a deeper frown. Since she was taking birth control pills to avoid pregnancy, why did she take vitamin C as a birth control pill? ”

The newly discovered clues made others puzzled, Yun Duruo suddenly raised his head and said thoughtfully.

"Thinking about this in another way, maybe we have been wrong all along, Nie Bingwan didn't really want to hide the man around her, she didn't want to get pregnant by taking birth control pills, maybe this was not her intention, maybe the man who didn't want to show up didn't want Nie Bingwan to get pregnant and cause the relationship to be exposed, but Nie Bingwan didn't want this to go on, so ......"

"So she secretly put vitamin C in her oral contraceptives, and she hoped she could get pregnant!" Nangong Yi's eyes lit up and took Yun Duruo's words.

If that's the case, judging from Nie Bingwan's photos, she has a pretty close relationship with this man, and if she doesn't take birth control pills, Nie Bingwan is likely to get pregnant, thinking of this, I hurriedly walked into the office and opened the previous autopsy report on Nie Bingwan.

I had done a blood test on Nie Bingwan and a poison test to see if she had taken any drugs before she died, but the blood test results showed that everything was normal, so I didn't look at it anymore at the time, I quickly found the blood test report, and looked down line by line until my eyes stopped at the column of the test content.

hcg:9――130（miu/ml）

Blood HCG test is the earliest and most accurate way to test whether you are pregnant, and the blood HCG test is generally 8-10 days after the relationship, and you can check whether you are pregnant by taking a blood to check for HCG.

"I was negligent in this detail, and what Du Ruo said is not wrong." I looked at the blood test report in surprise and said in surprise. "Nie Bingwan was already 3-4 weeks pregnant when she died!" MIAO pen ge.com updated quickly

And the HCG peak in Nie Bingwan's blood test was enough to prove the fact that she was pregnant.

"Suicide is already a serious crime, and now it is a serious sin to commit suicide in vain." The prince said with one hand folded and regretful.

"I don't know what these people think now, even if they want to commit suicide, they are pregnant, and they are afraid that they will suffer a lot if they go down there with one corpse and two lives." Han Yu sighed heavily and said in a low voice.

I took the blood test report and looked at it for a long time, walked back and forth in the room for a few steps, and slowly shook my head and said meaningfully.

"Maybe not...... Since Nie Bingwan secretly changed the contraceptive pill in order to get pregnant, and since she is pregnant, it means that her wish has come true, but from her behavior of secretly changing the contraceptive pill, it can be seen that some people don't want her to get pregnant...... If this person knew about Nie Bingwan's pregnancy......"

"Silence! Kill somebody to do away with a witness! Yun Duruo suddenly raised his head and looked at us.

An ID is a chance to guess the murderer, don't waste it on the teacher-student love == (this is not a spoiler)