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Hearing this, Tai Wei said strangely: "Since you know, why didn't you do it before?"

Sun Li spread his hands and said, "I did it, but I didn't find anything."

"There is no external organization, and there should be no internal organization."

Tai Wei gave Sun Li a sideways look, and said, "If something really comes out in a while, I'll fight you hard."

Sun Li shook his head helplessly.

He and Tai Wei have a very good relationship, they have been old colleagues for many years, and they often joke with each other.

If the result of the case is deviated due to forensic reasons, then he will indeed apologize to the other party.

There is no room for error in a murder case.

Time passed slowly.

half an hour later.

Fang Ze picked up the test tube in his hand and shook it, then put it back.

After that, he dripped the liquid in the test tube onto the test paper on the table.

This is wet starch potassium iodide test paper.

Looking at the test paper slowly turning blue, Fang Ze frowned.

"magnesium"

"calcium"

"Even Chlorine"

"What the hell metalwork"

Fang Ze took off his gloves and returned to the corpse.

"Fang team, is there any result?"

Sun Li asked quickly.

Fang Ze didn't answer right away, but stared closely at the wound of the deceased.

triangular triangular sharp "um"

At a certain moment, Fang Ze's gaze narrowed slightly.

After a few seconds, a smile appeared on the corner of his mouth.

"Guo Peng, this guy is really taking the edge of his sword."

"No wonder you haven't been able to find the murder weapon."

Hearing this, Tai Wei couldn't wait to say: "The murder weapon has been confirmed."

"what"

Feilu reminds you: three things about reading

Chapter 552 Murder weapon [2]

Fang Ze pointed to the examination table behind him, and said, "I found magnesium ions and calcium ions in the internal tissue of the deceased's wound."

"Don't you find it strange?"

Hearing this, Tai Wei scratched his head and said, "How strange?"

The knowledge of chemistry has touched his blind spot.

After all, that's what I learned in high school, and I've forgotten all about it.

"ion"

On the other hand, Sun Li focused his eyes and said, "Fang Que, there are no ions in solids."

"That's right."

Fang Ze nodded.

Such a simple common sense question, any high school student will know it.

unless it is an ionic compound.

But those...things are crisp and can't kill anyone.

So, where do these magnesium ions and calcium ions come from? They are absolutely absent in the human body.

Definitely an external cause.

And there is a great possibility that it fell from the murder weapon.

Sun Li frowned and fell into deep thought.

Fang Ze's test results brought the current problem into a kind of paradox.

The deceased must have been killed by a blunt object, that is, a hard solid object.

In solid solids, however, ions cannot exist.

Either one or the other, but all must be satisfied.

Is this possible? Tai Wei also understood at this time, that is to say, something that could not exist before has been detected now.

Fang Ze glanced at the two and said, "Magnesium ions and calcium ions are actually very common."

Hearing this, Tai Wei and Sun Li looked at Fang Ze at the same time.

Fang Ze continued: "When the tap water is boiled, there will be sediment at the bottom, which is scale."

"These scales are trace minerals, and the main components are magnesium and calcium."

"Tap water!"

Sun Li's expression changed.

Fang Ze nodded and said, "Yes, tap water."

"Also, I also detected chloride ions from the wound tissue."