Stranger crimes are harder to solve than crimes committed by acquaintances.

Crimes committed by acquaintances can be investigated one by one based on the contact list, and can be compared based on interpersonal relationships. There are too many unexpected factors in crimes committed by strangers.

After a long time, the police will know that speculating on a person's behavior is actually a very difficult and thankless task. It is also very difficult for normal people to predict the behavior of criminals.

For example, in the current case, it should be the husband of the deceased who did it.

He had the most reason to kill and the most reason to take away the child. But during the time when the victim died, the husband had just finished eating skewers and was sleeping with his belly full.

He didn't have to take any responsibility for his wife's infidelity, and he didn't even have to give her any money - the only problem was that the child was missing. Therefore, the man's relationships were thoroughly investigated.

Including the man's parents and brothers, they were all the focus of the police investigation.

Unfortunately, there were no clues. However, it is not very certain to prove that the man's family is innocent.

When the Japanese invaders came to the village to search for food, there were things they couldn't find. Even such severely wounded soldiers could be hidden. Therefore, the villagers' skills in hiding things can be very advanced.

And if it was a crime committed by a stranger, it would be even more difficult.

Furthermore, there are also inexplicable aspects to crimes committed by strangers.

Hou Lejia asked, "Why would a stranger take away a child?"

"I don't know," Jiang Yuan couldn't be bothered to guess.

There could be many reasons for taking away a child, but the evidence he currently had was only bloodstains. The only thing he could rely on was bloodstain analysis.

As for why a stranger would take away a child?

Maybe it's because he wants to sell the child. Maybe he's just a pure pervert. Maybe he happens to be infertile and needs a child. If Liu Jinghui were called over, maybe there could be a more accurate analysis...

Hou Lejia frowned like a happy dog.

Changing the direction of the investigation not only wasted the work of the past two days, but the biggest problem was also worrying about not being able to solve the case.

As an old criminal investigator, when Hou Lejia saw such a case, he immediately thought of crimes committed by acquaintances.

If it wasn't the husband, it would be the lover. Either it was the husband's relatives, or it was the lover's wife or mistress...

This is still a rural area. If it were ten years ago, there wouldn't be a single person in the village who wasn't an acquaintance.

Although there are factories now, there are several gates between the factories and the village, and they all have surveillance cameras. Although it's not very secure, the main reason is the same - there is no motive, and the victim has no reason to open the door.

Jiang Yuan looked at Hou Lejia's troubled expression and shook his head, once again walking to the door and saying, "Actually, from here, we can see that the victim was retreating step by step."

"What?" Hou Lejia was still weighing the pros and cons, but his thoughts were pulled back by Jiang Yuan.

Jiang Yuan simulated the actions and said:

"Looking at the direction of the bloodstains, the killer's knife might have been pressed against the victim's neck, or it might have been stabbing like this, so the victim retreated step by step. Look, there are even footprints..."

"If it was a crime committed by an acquaintance, it means the victim knew the killer. If the door was opened, it was opened, and if it wasn't opened, it wasn't opened. Why did the victim open the door and instead retreat step by step?"

"So I think it's very likely that the victim heard some noise in the middle of the night and opened the door to check, but ended up being subdued and killed."

Hou Lejia also listened and then turned to look at his team of forensic investigators, asking, "What do you think? What about the direction of the bloodstains?"

The forensic investigators present, including the forensic investigators with a normal LV2 level and Hou Xiaoyong with an LV0.6 level, could only pretend to be ignorant at this moment.

Bloodstain analysis is something forensic investigators should know, but if you say it's a required course for forensic investigators, it's like a required course in college - I roughly know that there is such a thing, and I know where to find more information, but if the exam questions are beyond the syllabus, don't blame me for getting a zero.

Jiang Yuan casually recreated the scene, which was done based on his LV5 level. Hou Lejia made the forensic investigators of Longli County "feel" it, but no one really wanted to "feel" it.

Jiang Yuan couldn't say that with just three sentences, he made the captain of the Longli County Criminal Police Brigade spend 180,000 yuan on his investigative expenses.

Therefore, Jiang Yuan looked at the scene while adding more information, saying:

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"The killer's process of killing is relatively rough, but he initially used slashing motions, and the stabbing actions were quite direct. By the way, the killer used a relatively small dagger, which doesn't seem to be prepared for killing. Either he has never killed before, or he has no experience in stabbing people."

"Looking at the bloodstains in the bedroom, it should be an escalation of the crime. The killer started using stabbing motions, but at this point, his actions became hesitant. You can see from the bloodstains here... It can be seen that the killer relaxed his control over the victim at this time, giving the victim a chance to move and escape.""This seems more like the work of a stranger rather than someone familiar. From my understanding, the murderer initially aimed to intimidate the victim, and it was a very direct and harmful intimidation. But when it came to killing, they hesitated... The victim's personality, was she the fiery and fierce type?"

Hou Lejia was still immersed in the scene described by Jiang Yuan. As a veteran detective, he could imagine many scenarios himself.

Hou Xiaoyong naively said, "According to the villagers, the victim was indeed a fierce woman..."

"Cough, cough." Forensic Ye, though a bit absent-minded, was sensible enough to interrupt Hou Xiaoyong, "The deceased, Wang Huizhi, was a local, 28 years old. She was 165 cm tall and weighed 70 kg. She was physically strong, spoke and acted tough, had a temper, and often clashed with villagers. Especially after having a child, she exhibited some rather extreme behaviors."

"Extreme behaviors?"

"Uh, she once threw her child's diaper into her brother-in-law's house, and even threw a bag of feces into her neighbor's house. She claimed it was her child's, but the neighbor suspected it was hers. The village's electricity often tripped, causing many complaints from several neighbors... In most conflicts, Wang Huizhi usually had the upper hand..."

Forensic Ye indirectly described Wang Huizhi's fierce personality, then continued, "Because of Wang Huizhi's personality and a series of past incidents, we believe that the probability of the perpetrator being a local is relatively high."

"If it wasn't a family member, could Heizi sniff them out?" Jiang Yuan suddenly remembered that he had been sold at the price of a dog.

If it was a local, the blood traces would easily leave a scent, which couldn't be completely washed off by an ordinary bath.

Hou Lejia said solemnly, "Heizi came to the village a few days ago and sniffed around, including the factory, but found nothing."

"If it was a family member, the scent could be confused." Forensic Ye said, then added, "Of course, the canned food factory could also affect Heizi's sense of smell."

"I think we can allocate some manpower to investigate previous theft convicts." Jiang Yuan didn't want to directly propose a detection plan, as this was in another county.

But Hou Lejia's indecisiveness made Jiang Yuan a bit impatient.

If they only investigated previous convicts, there was no need for a full team. A squad's manpower would be more than enough.

For ordinary theft or burglary cases, even a third of a squad might not be allocated.

For a murder case, diverting a squad's manpower was nothing.

Hou Lejia was indeed a bit taken aback, but still hesitated, "Only investigate previous convicts?"

"The murderer didn't leave a single piece of skin or hair, which indicates a very professional burglar, likely one who has been caught before." Jiang Yuan had a lot of experience in catching thieves.

Most thieves are not highly educated. In other words, they rarely learn about thievery through reading or watching videos. Most thieves are educated by society and prison, improving themselves through repeated convictions.

It can be said that if a thief has never been caught, it's hard for them to cover all bases, they don't understand, and they don't care.

"What's the scope?" Hou Lejia asked, "Mainly around San'an Village?"

"It's not necessarily a local, it could also be a transient criminal." Jiang Yuan thought of the cases he had been working on these past few days, "You can check the burglary cases in the surrounding area, see if there are any surveillance footage, footprints, or other evidence to bring over. Thieves don't just commit one crime."