Gao Facai was indeed an expert. Not long after Gao Facai arrived, the forensics department sent him new information.
First, Gao Facai extracted a common soil microorganism from the surface of the metal box. Through the growth cycle of the microorganism, he calculated how long the metal box had been buried in the soil.
According to his calculations, Tao Xiang's metal box had been buried there ten to thirteen years ago, while Du Manting had died twenty-one years ago. This discovery showed that Tao Xiang didn't bury the box right after Du Manting's burial.
Following that, important discoveries came one after another. Gao Facai was able to detect the relevant time through the skulls and the trace elements in the preservative.
It turned out that the preservative and the skulls had been dumped in the metal box five to seven years ago.
Five to seven years ago was the time when Tao Xiang stole the Tamil Star. So, why did he dump the skulls into the treasure box at that time?
Gao Facai led his team and used some kind of chemical method to detect traces of lacquer and gold and silver powder in the scratches inside the metal box.
This proved that there were other gold and silver lacquer items in the metal box. Could those gold and silver lacquer items be Tao Xiang's treasure?
Through these three discoveries, Zhao Yu and the others could roughly figure out the sequence of events.
About ten years ago, Tao Xiang buried a metal box in Du Manting's grave. At that time, the metal box might have contained a lot of gold and silver treasures. Maybe Tao Xiang wanted to pay tribute to Du Manting, or maybe he needed a place to store his treasures.
But, six years ago, Tao Xiang took the treasures out of the box and replaced them with the skulls of the deceased!
So, that day six years ago seemed to have become a key point. What happened that made Tao Xiang do that?
Could it be related to the Tamil Star?
Could it be that, if they could solve this problem, they would be able to find the whereabouts of the treasure and the Tamil Star?
Gao Facai's efficiency was amazing. It was only ten o 'clock in the afternoon, but he already had a new discovery. Through the examination of the six skulls, he found that the preservative used on the skulls, as well as the composition of the preservative, were different.
The older the skulls were, the simpler the preservative method and the composition of the preservative were. But, in the later stages, the preservative method became more and more advanced.
Although this discovery was shocking, Zhao Yu was already mentally prepared for it.
This was because Gao Facai's discovery was very consistent with the autopsy report of the Headless Female Corpses Case.
After the case, the forensic scientists also found a pattern. The later the headless female corpses were found, the more sophisticated the preservative method was.
Therefore, the police believed that the murderer was constantly trying and improving throughout the entire process of committing the crime. While he was dealing with the corpses, he was also looking for a better preservative method.
When it came to Bai Lili's body, the corpse was well taken care of.
The murderer cut a hole in the carotid artery of the corpse and used a professional instrument to drain the blood of the deceased. Then, he poured a self-made liquid into the carotid artery. This preservative not only had the effect, but it could could also make.
It was said that such a method could only be used by professional undertakers, especially when it came to the special preservative liquid. It was usually a family secret, so it wouldn't be easily leaked.
Gao Facai's autopsy report pointed out that there was a hole in Bai Lili's skull. He suspected that the murderer might have tried to extract Bai Lili's brain to try some kind of preservative experiment. Also, there were traces of some preservative that had been applied to some of the skin tissues.
Hence, all the signs showed that the murderer had put in a lot of effort into the preservative treatment of the corpses. The murder was more like an experiment, which was obviously beyond the psychological range of an ordinary murderer.
"Aiya!" Looking at the reports from the forensics department, the members of the special investigation group, who were enjoying their lunch, suddenly lost their appetite. Wu Xiumin looked at the report and creased her eyebrows. She then said to everyone, "Why do I feel that this case isn't as simple as it seems? There are many things that seem reasonable, but they don't seem to be explainable! "
"Really? For example? "Ran Tao put down his lunchbox and asked curiously.
"You see … Tao Xiang liked that woman, so he wouldn't let anyone bully Du Manting. He would turn anyone who dared to offend Du Manting into a headless corpse!" Wu Xiumin creased her eyebrows. "But, why didn't he just kill Cui Fangyu? Don't you think that Cui Fangyu's betrayal led to Du Manting's death? Plus, not only did he not kill Cui Fangyu, but he even helped Cui Fangyu look for his child. Isn't this unreasonable? "
"That's easy to explain. Tao Xiang doesn't have that kind of power, so what if he killed Cui Fangyu?" Ran Tao patted his chest and said, "I think that everything was done by Tao Xiang secretly. It was all his wishful thinking, and neither Du Manting nor Cui Fangyu knew anything about it!"
"Mm … Tsk tsk …" Wu Xiumin said. "If the six women that Tao Xiang killed were all for Du Manting's sake, why didn't he wait for Du Manting to be buried there? Why did he wait for so many years? Plus, even if he waited for so many years, why didn't he just bury the head in the grave? Why did he put a lot of treasures in the grave? It doesn't make sense! Treasures, heads, what's the point of exchanging them here and there? "
"You've never been married, so you don't know!" Ran Tao teased Wu Xiumin again. "Do you think it's easy to raise a child? Tao Xiang needed time and money to raise the child. So, in order to raise the child, he dug up all the treasures and sold them. "
"I told you, don't interrupt when we discuss the case!" Wu Xiumin pouted. "Your greatest ability is to mislead us! Just eat your lunch box and don't talk anymore! Please … "
Tsk tsk …
Listening to his team members' discussion, Zhao Yu felt that something was amiss. He also felt that there were many strange things about Tao Xiang's case.
Moreover, Tao Xiang's personal situation was very different from what he had guessed.
For example, from the way the murderer handled the headless female corpses, he must have been a meticulous, gloomy, and paranoid perfectionist!
But, besides being meticulous, the king of thieves, Tao Xiang, didn't seem to fit these characteristics.
If Tao Xiang was really a perfectionist, the head in the box wouldn't have been like that. The box was so big, and there was so much space in it that he could have put the head and the bottle of embalming fluid in it!
Just like Li Dan in the Lost Hand Case. Li Dan was not a paranoid person in the strict sense of the word. She even kept her chopped off arm! So, as the murderer of the Headless Female Corpses Case, he should have been even more careful in storing it.
Tsk tsk … The more Zhao Yu thought about it, the more he felt that the evidence that he had obtained that day was a little off.
Could it be that there was more to this case?
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