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The human neck is covered with trachea, blood vessels and nerves.

If the external jugular vein is injected carelessly, it is easy to tie the wrong artery, or it may cause the person being injected to haemorrhage, or even die directly on the spot, making it impossible for the murderer to continue the next 'ritual'.

Unless the murderer is very familiar with human blood vessels and is very confident in his acupuncture skills, it is impossible for him to dare to drug the deceased through external jugular vein injection.

"I found it!"

Liu Haoqiang's sudden shout made Meng Changli tremble in fright, and his thoughts were withdrawn from the scene he just saw.

Realizing that he was bluffing and scaring people, Liu Hao forcefully smiled at her and said:

"This is the letter of introduction and marriage certificate issued by the sub-district office, as well as a certificate issued by a doctor from the county hospital below Jicheng City!"

He rummaged through the slits at the bottom of his duffel bag and found several certificates.

"The man who came to see the doctor is Zhang Tao, 25 years old, from Jicheng. Because he has been suffering from heartache and nausea and vomiting for a long time recently, the doctor recommended that he go to a large hospital for a more detailed examination."

"His wife Zhang Chunhua is accompanying her. She is 23 years old this year. The two got married four years ago. The problem is...the two people on the bed are not even wearing clothes, and their faces are so rotten that they are unrecognizable. How can we confirm that it is them?"

Naturally, Meng Changli couldn't tell what he 'saw', so he could only hand over the medical certificate and the radiograph in his hand, hinting: "Zhang Tao suffers from very serious gallbladder stones, which should be confirmed through an autopsy."

"The bone ages of these two corpses are consistent with what Xiao Liu said." Zhang Aimei was busy stuffing several plump white maggots into a glass bottle. After hearing this, she raised her head and said:

"According to what Xiao Meng said, we can at least confirm the identity of the male deceased after the autopsy. The main trouble now is the needle hole in the neck besides the identity. The specific drugs and related dosages that were injected will have to be sent for testing before we can know. I'm afraid it will have to wait."

Meng Changli held down the hand he habitually wanted to raise and twirled his fingertips.

At present, only the poisoning laboratories of provincial departments and the Ministry of Public Security can perform precise poisoning, and it will take at least a week for the local public security bureau to get the test results.

Even if they are located in the Beijing Public Security Bureau, they are still no exception.

This takes too long...

Meng Changli asked: "Forensic Doctor Zhang, are we allowed to do copper-pyridine reaction identification in our bureau?"

A flash of surprise flashed through Zhang Aimei's eyes: "Although it has been a long time since the death of the deceased, he should still be responding, but the specific dose cannot be detected. But Xiao Meng, have you learned this?"

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