When everyone saw this passage in "The Collection of Grievances", they all felt that Su Huai simply treated them as idiots!

If the modern forensic examination goes to the scene of the murder and no blood stains are found, luminous ammonia is usually used to make the blood stains visible, that is, luminol.

Since hemoglobin contains iron, iron catalyzes the breakdown of hydrogen peroxide, turning hydrogen peroxide into water and monooxygen, which reoxidizes luminol to make it shine. Therefore, luminol is mainly used for blood testing in modern forensics.

However, before luminous ammonia can be used, it is a huge problem for the entire detective community to examine the blood stains that have been eliminated from the crime scene!

Su Huai actually said that the ancient Chinese people could have been tested a thousand years ago!?

"What nonsense this little bastard is. Pat couldn't help but sneer at this moment.

"Whether it's true or not, we'll find out if we check it. Zhang Hua looked extremely calm.

"Zhang Hua~~ You really like to speak for the Chinese people, this wine is an ethanol solution, vinegar is an acetic acid solution, they will not have an obvious color reaction with hemoglobin, how can it be possible to make the dried blood stains colored. After Pat sneered, in order to convince Zhang Hua, he asked the staff to find wine and vinegar.

"I'll convince you Huaxia people this time!"

In the face of ridicule, Zhang Hua was not angry at all, and softly asked his assistant to find relevant materials, there is an inspection department behind their federal court, and there are a lot of relevant evidence, some of which have been closed, and can be used for a small experiment.

Seeing that the staff came over with a piece of evidence clothes, and everyone gathered around, Pat also took a deep breath at the moment, although he felt that he must be right in theory, but he was a little worried about being cheated by Su Huai so many times.

I only saw Pat slowly pour the vinegar and wine on his clothes in front of everyone, and everyone stared at it for a long time.

found that there was no change in this evidence.

Pat was completely relieved at this moment, and laughed loudly: "If you see it, I'll just say that this guy is talking nonsense, right? If this method can be revealed, then the sun must come out of the west." ”

All the judges and prosecutors also laughed, just now they looked for a flaw in the "Collection of Grievances" for a long time, but they were slapped in the face so many times, and now they finally found it.

But at this time, I saw Zhang Hua silently come over, he took a test tube in his hand, gently dropped two drops into Pat's wine vinegar mixture, and then dropped the wine vinegar mixture on the evidence clothes.

At this time, when everyone looked again, they saw that dark red blood stains gradually appeared on their clothes!!

Although the color is very light, you can still see it clearly.

"It's really turning red!?"

"Bloodstains?"

"How is this possible?"

"This ...... What's going on?" all the judges and prosecutors' faces changed.

Pat was stunned on the spot, and his first reaction was to glare at Zhang Hua angrily: "Zhang Hua!!What did you do? Did you add luminous ammonia to it?"

As he spoke, he snatched Zhang Hua's test tube, but as soon as he smelled it, Pat's face changed.

There is no pungent smell of ammonia, which is not luminous ammonia......

Zhang Hua said lightly: "I added a catalyst that is not luminous ammonia, but wine and vinegar to produce ethyl acetate, and ethyl acetate can indeed show blood stains." ”

Although there were many judges and prosecutors present, there were very few people who could understand the chemical principle that Zhang Hua said.

Pat was obviously not one of them, he just heard Zhang Hua say to use catalysts, and immediately asked rhetorically:

"Even if this principle is correct, then when Song Ci tested, where did the catalyst come from!?"

Zhang Hua looked at Pat like an idiot:

"Didn't you read carefully the contents of the "Collection of Grievances"? The method of blood test described in the chapter just now is specially used in fires, and after the charcoal wood is heated into ash, the trace elements in it will produce a similar catalytic effect, and if he splashes it on the soil with a catalyst, it will naturally make the blood appear. ”

Pat was dumbfounded when he heard this, he didn't expect this detail at all, and Zhang Hua's level was obviously much higher than him.

At this time, I heard a hoarse voice asking:

"Even if your inference is correct, the purity of this natural catalyst is not high, and the analysis of pure acetic acid and ethanol in the absence of concentrated sulfuric acid catalysis and no heating, it takes more than ten years to react to produce ethyl acetate with a yield of less than 50 percent, I don't think the blood stains are so obvious. ”

When they looked back and saw the man who asked this, Justice Singh, they couldn't help but fall silent.

"Reply to the teacher. Zhang Hua calmly responded:

"The student has a conjecture that can explain the principle, but I'm afraid it will take time to verify, it's just a speculation."

"Tell me about it. Justice Singh nodded.

Zhang Hua turned his head and asked Pat:

"Prosecutor Pat, do you know what the bloodstains are made of?"

Pat sneered: "Zhang Hua, you test me, who here doesn't know that the components of blood and blood stains are mainly water and protein, followed by a small amount of glucose, low-density lipoprotein, inorganic ions, etc. ”

Zhang Hua nodded neither humbly nor arrogantly:

"Well, the essence of blood clotting is that the soluble fibrinogen in the plasma is converted into insoluble fibrin, and the water of the blood stain evaporates over time, so we can know that the main component of the blood stain is animal protein. ”

"What the hell are you going to say?" said Pat, a little impatient.

Zhang Hua said slowly:

According to the theory of traditional Chinese medicine, vinegar is warm, has the effect of invigorating blood and removing blood stasis, reducing swelling and detoxifying, and the "Compendium of Materia Medica" records that vinegar can "disperse blood stasis, treat jaundice and yellow sweat". "Materia Medica" describes that "vinegar is good for blood", and believes that vinegar has the effects of dispersing stasis, stopping bleeding, reducing swelling, detoxifying, and killing insects. ”

Zhang Hua said, took a deep breath, and said slowly:

"Therefore, I deduce that the so-called blood stasis is also related to its dissolution of coagulated proteins, the effect of wine is to volatilize the blood stains in the ground, and the effect of vinegar is the effect of vinegar and the coagulated proteins in the blood stains, so that it dissolves and manifests ......"

After Zhang Hua finished speaking, everyone present felt that their scalps were a little numb, and they all looked at each other, but no one could refute Zhang Hua's words.

In the final analysis, Zhang Hua is just an inference, and there is no actual evidence, but in fact, his inferences include criminal investigation, forensics, traditional Chinese medicine, chemistry, etc., although everyone present is the elite of the federal court, but in terms of comprehensive ability, no one can compare with Zhang Hua.

And if it is said that this "Collection of Grievances" was forged by Su Huai...... So does it mean that this Su Huai is completely above all the elites of the federal courts on the scene?

But if what Su Huai said is true, this Song Ci is a person from a thousand years ago...... "Collection of Grievances" is an ancient Chinese book, then the truth is even more terrifying.

That is to say, among their group, except for Zhang Hua, they are not even as good as the primitive people of China for thousands of years......?