Chapter 297

"I confirmed with the deceased's husband that this family's smart home appliances can not only control the lights remotely, but the bathroom heater and exhaust fan on one line can also be turned on. In addition, the air conditioning and fresh air system can also be. The shower head and bathtub are also controlled, including water intake and drainage..."

Captain Ma returned to the scene, and while talking about the situation, he couldn't help but nag: "How can someone have all the home appliances in their house connected to the internet? Not only letting people control it, but also having to spend more money themselves?"

"It should be quite convenient."

One-touch hot water, sitting on the subway, the bathtub in the bathroom has already started to store water, and when you get home, you can take a bath directly. Doesn't it sound quite beautiful? Tang Jia was the first to stand up and express opposition; this was originally something she was willing to do.

Captain Ma curled his lips: "As for fighting for those few minutes..."

Wan Wan Baoming hurriedly said: "I've called the technicians over; we'll see if we can find the person who used this software. If the other party just used it normally, they should all leave traces."

Jiang Yuan listened to the few people talking and was still silently scanning the bathroom. Regardless of whether the murderer used this system or not, he had indeed committed the act of killing and faking the suicide scene, and it had to be done in this bathroom.

As a result, the probability of leaving traces was also greatly increased. Moreover, Jiang Yuan didn't believe that anyone could be perfect in every aspect. This person spent effort on faking the scene, so they might not necessarily have enough time and energy to eliminate traces.

Many people have huge misunderstandings in thinking and doing things, just like saying, to kill a Husky alone, hang it up, and fake it as hanging itself, how much effort and time does it take? Cleaning the bathroom? Many people may have never tried to deep clean a bathroom in their lives. If you want to clean every corner of the bathroom and not leave a single trace, how much time and energy would that take? If you fall down due to physical exhaustion in the middle, break your elbow, and have to clean it again, some willful players might just give up directly.

Give up and give up, see you on the execution ground.

The above are still murderers who know how to do things; some murderers have obvious shortcomings in life, so it is even harder to kill and remove traces.

For example, some people don't know how to tie knots in ropes, the hanging knot is not good, the body of more than a hundred pounds is lifted up, tired and sweating, and they have to be careful not to get it on the deceased's clothes, then, with a plop, the rope opens, and the body falls to the ground. How angry, how difficult! In addition, if the murderer wants to fake the scene, many means cannot be used.

Like some cleaning supplies, they can indeed destroy DNA, but they are not common cleaning items, or the victim's family didn't buy them, so the murderer might have to risk leaving their own DNA behind. This is the risk that must be faced while gaining benefits from faking the scene.

Jiang Yuan is now blocking the murderer from not cleaning the scene thoroughly.

His lv4 crime scene investigation skill can easily find problems in crime scenes that lv2 has investigated.

An ordinary murderer, if they haven't undergone professional training, why would they not leave any traces at all?

Of course, people nowadays, those who know the ropes can wear gloves, so there is a high probability that there are no fingerprints. Jiang Yuan, however, swept up quite a few skin dander and hair at the scene. Especially inside the sewer and inside the washbasin, there were short hairs taken and water stains wiped.

The deceased had long hair, and her daughter also had long hair and lived at school. The deceased's husband was semi-bald, and the length of the remaining hair was relatively long.

The source of these short hairs is more thought-provoking.

Jiang Yuan carefully took multiple short hairs, put them into evidence bags separately, checked various toiletries, and then wiped a box of cotton swabs in various suspicious places, feeling a little more comfortable.

Compared to the determination of the time of death, obtaining this kind of evidence felt more solid.

"Almost there." Jiang Yuan also directly collected items such as towels into a large evidence bag.

Solving a homicide case, there is no need to save money for the Criminal Investigation Detachment.

Killing is actually quite tiring, referring to killing a 100-pound Husky and then hanging it up to fake it as suicide.

The

environment of the bathroom is also airtight, and it is very normal to be covered in sweat. If the murderer wiped sweat, then there might be the murderer's DNA on the towel. If the murderer let the sweat drip, then many water stains on the ground that were just wiped might have the murderer's DNA.

If the murderer washed directly with water, then there might be his DNA in the washbasin that was just wiped.

The power of DNA is that it is extremely trace; in an environment like a bathroom, unless cleaning and disinfecting items are used reasonably, even if it is flushed with water many times, it may still remain.

Yet, in order to fake the suicide scene, the murderer cannot use unconventional cleaning agents, which makes it possible to leave DNA behind.

The asymmetric warfare between the murderer and the police is like this.

If the murderer chooses to fake the scene, they cannot eliminate evidence. If the murderer chooses to eliminate evidence, they have to face the risk of omissions, as well as the trouble and professional requirements of carrying various cleaning supplies. Similarly, they also have to face the risk of omissions.

Of course, they can also choose not to handle the scene and adopt the shortest contact time and contact method.

But murderers killing, many times, are actually venting emotions. Since they cannot control their emotional venting, they may not necessarily be able to maintain considerable discipline when killing.

On the other hand, the shortest contact time and contact method also have to face street cameras, possible eyewitnesses, and the victim's resistance.

Just like the 513 door-stabbing case Jiang Yuan did before, that could be considered a short-time contact case with luck, but after the window paper of two or three layers was broken, the evidence left behind was still quite a lot.

However, if Jiang Yuan hadn't appeared to determine the time of death of the body, making the husband the first suspect, then the crime scene investigators might not have desperately collected evidence.

Because the husband's DNA must be all over the bathroom, as for whether there is other people's DNA, usually it won't be investigated deeply.

Who doesn't have people coming over, leaving some sweat beads in the bathroom? Several crime scene investigators from the Criminal Investigation Detachment continued to be busy in the living room and bedroom, hoping to collect something else.

Homicide cases are different from other cases; they usually have relatively strong motives.

Without sufficient motive, not being an anti-social personality, one won't kill easily.

And cases where the scene is faked, once the veil of faking is lifted, the content usually becomes straightforward.

Just like at the beginning, everyone was staring at the deceased's husband; if the deceased was not killed by her husband, then the killer must have a strong relationship with her.

While busy, the technicians from the Cyber Security Detachment also arrived.

Similar to the investigation box of the crime scene investigation or the forensic investigation box of the forensic doctor, technicians doing the network also have their own investigation boxes, which must contain "violent" equipment for obtaining data, usually used to deal with mobile phones, and other smart devices naturally cannot escape.

Jiang Yuan and the others went directly out of the room to wait.

The victim's family and several neighbors were taken to the case handling center to take statements.

The hallway was quite quiet for a while. Wan Wan Baoming looked left and right at this time and said: "If it weren't for the smart home appliances, there should be someone hiding in the ventilation pipes and the like here now."

"Hiding in the corner, waiting for us to leave and then jumping down?" Captain Ma was quite cooperative.

"Maybe the alarm was too fast."

"By the way, the deceased's husband came home faster than usual this time."

"Coming back fast is useless, and, not saving people first, but directly calling neighbors to shout, is also relatively rare."

Several people were muttering at the door.

Soon, the technician walked out from inside, looked at the record in his hand, and said: "Someone did open the bathroom heater lights and shower head at 10:21, and the air conditioning was heating. At 11:20, the shower head was turned off and the bathtub was controlled to drain water. At 11:25, the exhaust fan was turned on, the air supply volume of the fresh air system was adjusted, and the air conditioning was changed to cooling.

At 11:35, the bathroom heater was turned off, and the exhaust fan and air conditioning were turned off." Captain Ma's face was serious: "Someone really used this thing."

Wan Wan Baoming also had an ugly face and looked at the technician: "Can you find out who controlled it?"

"We can only find out after going back. If the other party is prepared, we might not be able to find out." The technician said.

Tang Jia said at this time: "Can we look at the people who connected to the Wi-Fi before? Records on the router and the like."

The technician said: "We can look, what are we looking for?"

"Murder always has a reason, right? If it's not a property dispute, this kind of murder, could it be because of emotional problems?" Tang Jia said in a very small voice: "The murderer knows the situation of the deceased's family very well, at least they must have been here to know that there are these smart home appliances..."

"Okay, let's investigate according to this line of thought." Captain Ma immediately nodded and added: "Find the person, compare it with the DNA found at the scene, and see if it can match."

--Proceed to view