On the way from the provincial hall to the deceased's house, Han Bo leaned against the car window to look at the city, which he still felt strange even though he had been to it several times. Pen ~ fun ~ pavilion www.biquge.info

The reason why I feel strange is not only because of the language barrier and the fact that I can't understand the local dialect.

This feeling is mainly caused by the terrain, a person who was born and raised in the Yangtze River Delta Plain, when he was a child, only saw rockeries in the park, it is hard to imagine that there will be so many mountains here, and the whole city is actually built on the mountain.

Xinyang is located on the eastern slope of the Yunnan-Guizhou Plateau, which belongs to the transition zone from eastern to western plateau in China.

The topography and landform trend are roughly extending from east to west, with large undulations, high in the north and south, and low in the middle. The peculiar karst landform is widely distributed, there are plateaus, mountains and hills, basins and river valleys, terraces, the highest altitude is 1762 meters, the lowest is 506 meters, and the average altitude of the urban area is 1071 meters.

The city is surrounded by mountains and lush forests.

The city's meandering rivers, patches of green spaces by mountains and rivers, and parks of different postures are dotted in front of you, and the scenery is picturesque, which may not be a first-tier city, but it is definitely a green city.

"Han Chu, I went back last night and thought about it all night, if Fu Liqin and Fu Liqing's sister and brother are not murderers, then who can do this? There must be a motive for killing, and a reason is needed for murder, if the murderer is someone else, what is he trying to do, and what can he get by killing Tan Xingtao's family?"

After holding it all morning, Ge Zhengjian finally couldn't hold it back, and he couldn't help but analyze the case while holding on to the steering wheel.

Han Bo relieved himself and asked rhetorically: "Others can't do this, Fu Liqin and Fu Liqing can do it?" Don't forget that one of the deceased is Fu Liqin's biological daughter and Fu Liqing's niece. For the custody of the child, they have been to the forensic doctor and have fought lawsuits. Tiger poison does not eat children, how can they do it to children. ”

Just thinking about the grievances between the Fu family and the Tan family, I actually forgot that there was a child.

Ge Zhengjian was asked, and said: "Maybe, maybe they don't know that the child is at home, or maybe they have already taken this into account, Fu Liqing went over at night to pick up the child and save the child." ”

To solve a case is to make bold assumptions and carefully verify them.

It can be said that in the course of the investigation of the case, the "presumption of guilt" is adopted, and this cannot be the case when entering the pre-trial process, and the evidence must be strictly examined. When a case is transferred to the procuratorate to enter the stage of examination for prosecution, or when a public prosecution is filed with the court and enters the trial stage, the principle of "presumption of innocence" must be strictly followed to avoid causing unjust, false and wrongly decided cases.

Although the young man is full of speculation and has no evidence, this assumption is not wrong, after all, the Fu family sisters and brothers are indeed suspected of committing crimes.

Han Bo pondered for a moment and said lightly: "The breakthrough in this case, I think it should be in the suspect's modus operandi, or where the lethal gas came from, as long as this can be figured out, the next work should be easier to do." ”

"Han Division, are you saying that the investigation direction of the task force is wrong?"

"Yes, the basic work is essential, but we are in a different position from them, and we don't need to do the basic work, the preliminary work. ”

The special case group is now cooperating with multiple police departments, giving full play to the advantages of the "large corps" in combat, and casting a wide net so that no matter which line there is progress, the case can be successfully cracked.

This is the case at home, and the same is true for foreign counterparts.

Reasoning and analysis, ring after ring, solving one mystery after another, that is detective fiction. If you don't have enough resources and don't invest a lot of human and financial resources, it's useless to let Sherlock Holmes come through, even if it's just a not very complicated case.

The basic work and preliminary work are very important, Ge Zhengjian thought so, thought about it and muttered: "How did the murderer get rid of the poison, and how did the poison gas appear in his house?"

"So we have to go to the field to have a good look, and perhaps the comrades of the task force have also taken this into account, and are investigating the scene and visiting and inquiring. ”

……

While chatting, the car has approached the community.

Knowing that the leaders didn't want to alarm too many people and didn't want to cause panic among the residents of the community, Ge Zhengjian parked the car outside the community, locked the car door and walked into the community with Han Bo.

Han Bo guessed correctly, the task force really wanted to find out where the poison gas came from.

There are four police cars parked in the community, one policeman is busy questioning an old man, and the others are estimated to be in the building. The deceased's house is the easternmost set of the whole building, and two policemen are lying on the east balcony, studying the outdoor unit of the air conditioner.

"The air conditioner can't only have air outlet and no air intake, otherwise it won't be vacuumed. Dapeng, you have an air conditioner at home, do you know where the air intake is, is it possible for the murderer to use the air intake?"

"I have air conditioning in my house, but I only use it. ”

The two upstairs speaks Mandarin, one of whom should not be a local, Han Bo heard it clearly, stopped in the southeast corner of the house, and said while observing the surrounding environment: "The car air conditioner has an air intake, and such an air conditioner does not have a special air intake, because the structure and principle are not the same." ”

During the night, quite a few personnel were urgently transferred to the task force, coming from several units.

The two upstairs were not police officers of the sub-bureau, they had never seen Han Bo before, and they didn't know that he was a deputy division-level investigator from the Criminal Investigation Corps of the Provincial Department who came to guide the investigation.

Han Bo is so young, Ge Zhengjian is even younger, thinking that he is a peer of the sub-bureau.

One of the older policemen asked curiously, "Dude, what's the difference in principle?"

The deceased's economic conditions were indeed good, and he decorated the garage downstairs beautifully, and because the south-facing garage had been renovated, it could no longer be used as a garage, so he parked an Audi car worth more than one million yuan at the door of the garage.

However, the car is still there, but the people are gone!

Han Bo glanced up, his attention shifted to the car again, and explained while observing: "This compressor air conditioner compresses the gaseous freon into liquid freon at high temperature and high pressure, and sends it to the condenser, that is, the outdoor unit to dissipate heat and becomes liquid freon at medium temperature and medium pressure, so the outdoor unit blows hot air.

The liquid freon enters the evaporator, that is, the indoor unit, through the capillary, and the space suddenly increases, the pressure decreases, and the liquid freon will vaporize. From liquid to gaseous state is an endothermic process, absorbing a large amount of heat, the evaporator will become cold, and the fan of the indoor unit will blow the indoor air through the evaporator, so the indoor unit blows out cold air. ”

Sounds a little reasonable, this kid really understands, did he fix the air conditioner before he became a policeman?

The two upstairs looked at each other, and actually leaned on the balcony window to listen.

Han Bo looked up and pointed to a small tube that they could just see, and continued, "The water vapor in the air will condense into water droplets when it encounters a cold evaporator and flow out along the water pipe, which is why the air conditioner will come out of the water. Then the gaseous freon returns to the compressor to continue compressing and continuing the cycle.

In other words, the air blowing inside is still indoors, and the air blowing outside is still outside, and there is no need to take in air for ventilation. Of course, today's air conditioners have the function of purifying the air, that is, ventilation, but this function is rarely used by most people. ”

The short policeman upstairs was amused and reminded, "Dude, you're talking about cooling, we're talking about heating." ”

"It's the same with heating. ”

"How can heating be the same, isn't heating just about electrifying the heating wire and blowing hot air into it after heating? ”

This is common sense, how can they not even understand common sense.

It seems that there is really a problem with the current way of education, and many things will only be used without understanding the principle, let alone repaired. Unlike the Americans, the car is broken and repaired by itself, and the electrical appliances are broken first to take a look, it is said that some Americans even have small machine tools at home, and all kinds of tools are complete like auto repair shops.

Han Bo sighed secretly and patiently explained: "Two, when this kind of air conditioner is heating, there is a component called the four-way valve, which makes the flow direction of the condenser and evaporator opposite to that of refrigeration, so when heating, the outdoor air blows cold air, and the indoor unit blows hot air. Its practical application is the principle of liquefaction, that is, the heat must be discharged when the gas changes to a liquid state, and vaporization, that is, the heat must be absorbed when the liquid changes from a gas. ”

"There's no heating wire in there?"

"No, I don't believe you can take it apart and take a look. ”

Xinyang City is cold in winter, but not as cold as Northeast China, nor as cold as Jiang Province.

It has a humid and mild subtropical climate, with no scorching heat in summer and no severe cold in winter, with abundant sunshine and abundant rain.

The air is not dry, there is no wind and sand in all seasons, and the average annual temperature is about 15.3 °C. The hottest month of July is the hottest month with an average temperature of 24°C, while the coldest month of January has an average temperature of 4.6°C. The pleasant climate for Xinyang has won the reputation of "heaven above, Suzhou and Hangzhou below, and Guiyang with a pleasant climate".

Because the summer is not particularly hot and the winter is not particularly cold, many families with good economic conditions do not install air conditioners, and even if they do, most of them are tried several times in the hottest time in summer, and they are generally not turned on in winter.

Han Bo noticed that the air conditioning plugs in several rooms were unplugged last night, and he couldn't help adding: "Even if there is a heating wire in it, or the deceased has used the ventilation function, it must have electricity." The two of them can go in and look at the plug to see if they can find fingerprints or other traces left by the killer when he pulled the plug out. ”

This kid not only knows how to repair air conditioners, but also speaks quite badly.

The two upstairs thought that this might be a major discovery, but they made a big scene, thinking about it, they were a little unconvinced, and ran into the room to see, the air conditioning plug was really unplugged, and there was a thin layer of dust on the plug, which had obviously not been used for a long time.

Ge Zhengjian almost burst out laughing, seeing that the leader was interested in the deceased's car, he couldn't help but smile and looked up and shouted: "Dude, do you know where the car key is, we have to open it and take a look." ”

The policeman whose name seemed to be Dapeng poked his head out again and said stupidly: "In the hands of your Hou team, the Zhao detachment has explained that it is not safe to park the car here, and it will be driven back later." ”

"Where's the Hou team?"

"I should ask from above, you don't know, where do I know!"