With the appearance of Hu Yuanling's autopsy results and biological sample test report results, the cause of Hu Yuanling's death has finally been clarified.

She died from long-term use of antihypertensive drugs, coupled with her low blood pressure, her blood pressure dropped to a dangerous value, causing cardiac arrest, which was not rescued in time, resulting in death.

Although the cause of death is clear, a new suspicion has also emerged, that is, Hu Yuanling has low blood pressure, why does she still take blood pressure medication for a long time? Not only that, judging from the test results of Hu Yuanling's blood and stomach solution, she not only took blood pressure medication, but also overdosed on it for a long time.

As a criminal police officer, we still do not have a definitive evidence to prove that Hu Yuanling died of homicide, and theoretically there is still the possibility that she committed suicide by taking blood pressure medication for a long time.

What we need to do now is to thoroughly find out why she overdosed on blood pressure medication for a long time and where did the blood pressure medication come from.

At dawn the next day, Li Meng and I rushed to Hu Yuanling's home again to investigate and collect evidence, and this time the focus of our investigation was to find suspicious blood pressure medications.

The door of Hu Yuanling's house has been broken, it is not closed tightly, and the door lock seems to be false. However, there was a cordon at the door, and no one dared to enter the door without permission.

The room has been carefully investigated by the criminal police team, and there are many yellow physical evidence signs on the floor of the room, marking the location where the footprints were found and the location of various clues.

Avoiding the signs, Li Meng and I carefully searched the scene for blood pressure medication.

"The room is so tidy, how can it be a suicide......" Li Meng walked into Hu Yuanling's bedroom, which was still the same as it was in her usual life.

The room is clean and tidy, the items are placed in an orderly manner, and the clothes that have not been washed and collected are still hanging on the hangers by the window, which is full of life.

"Did you find anything like medicine?" I rummaged through the living room, opened the drawer of the coffee table, and casually asked in the direction of the bedroom.

Since it is a medicine that has been taken for a long time, it must be placed in a clear place, in a convenient place where you can reach it.

Li Meng carefully rummaged through the bedroom, including the bedside, dresser, wardrobe and other places, but did not find any suspicious items.

"No, was it taken away by the technical team that came to investigate the site yesterday? However, there is no mention of drugs in the on-site investigation records. "I sat on the couch and thought about it, and it was strange.

Are we wrong? Hu Yuanling died suddenly due to cardiac arrest due to a drop in blood pressure, and the ingredients of antihypertensive drugs were also detected in her body.

But what about medicine? Where's the medicine?!

At this moment, a thought-probating thought suddenly occurred in my mind.

That is, yesterday, after the police left, the murderer returned to the scene of the crime again and took the bottle of deadly blood pressure medicine.

There is indeed a theory in criminal psychology that criminals sometimes return to the crime scene and other places where it is easier to expose themselves in order to pursue a sense of accomplishment and excitement.

I settled down, sat on the couch and looked around, and finally my eyes fell on a lady's backpack hanging on the wall of the doorway.

I quickly got up and walked forward, looking through my backpack, which contained a lipstick, a women's wallet, a white pill bottle, and a plate of unfinished capsules.

"Little dream, come on!" I eagerly called to Li Meng in the bedroom.

"Found the medicine?!" When Li Meng heard the voice, he poked his head out of the bedroom, and then walked quickly to my side.

The white medicine bottle in the backpack, the label on it shows that this is a bottle of multi-dimensional element capsules of a certain brand, which is a medicine that replenishes the elements in the body and improves immunity.

The other plate of capsules is a certain brand of cold treatment capsules.

"There really is medicine." Li Meng was very surprised, because it was all the same as the small talk we had at the barbecue last night.

"But there are only cold medicines and multivitamin elements, and there are no blood pressure medications." I muttered.

"Take it back for testing, the medicine bottle is not, it doesn't mean that the medicine inside is not." Li Meng also muttered.

I took out a bag of evidence from my pocket and took the two pills with me.

……

The drug has been sent to the laboratory for laboratory testing to determine the composition of the drug.

But I still have a question that I haven't thought clearly, if the medicine was replaced, then when was it replaced?

"The three deceased are all members of the 'Seven Dragons and One Phoenix' school bullying gang. The killer has been identified as one of the children who was bullied. Li Meng said to me seriously.

I nodded, agreeing with her, and waited for her to continue.

"The three deceased died very close in time and died after the class reunion, so this reunion was definitely not accidental." Li Meng paused, and then said.

"So you suspect something went wrong at the class reunion?" I looked at her earnestly.

Li Meng looked at me in a daze, her eyes revealing a hint of disbelief, and she suddenly asked me, "Can you still know where your junior high school classmates live?" And how do they work and live? ”

"Yes!" I slapped my head and said with some excitement: "It is very likely that the murderer learned about the contact information and living place of the three deceased through the opportunity of the class reunion, so as to carry out targeted crimes." ”

"Did you not sleep well yesterday and your brain was stupid?" Li Meng looked at my suddenly realized expression, very disgusted, and once suspected that I was deliberately pretending to be stupid in order to set off her cleverness.

The more she thought about it, the more angry she became, and she punched me in the arm.

I was beaten with a stunned face, what did I do wrong and get beaten?

I suddenly remembered a joke on the Internet, a girl dreamed that the boy was cheating, and when she woke up, she turned around and gave the boy a mouthful.

There was no one in the office of the serious crime team, Jiang Tingbai was busy investigating the footprints and fingerprints extracted from Hu Yuanling's house in the trace examination department, and Lin Zifan and Xue Hang took the criminal police team to continue to investigate the members of the class reunion.

After investigation, a total of 28 people attended the class reunion, and the murderer must be among these 28 people.

It didn't take long for the laboratory department to conduct an inspection based on the medicine we brought back from Hu Yuanling's home this time.

Sure enough, the white pill bottle of the multi-dimensional element capsule contained a multi-dimensional element capsule at all, but a capsule with the ingredient of a blood pressure lowering drug.

In other words, someone used a blood pressure medication capsule and secretly replaced the multivitamin capsule.

Moreover, the murderer must have been secretly replaced at the class reunion......