"One is that these deceased people have been taking a drug for a long time before their deaths, called 'carmakazine', which is used to treat epilepsy and 'post-traumatic stress disorder syndrome', but because of the side effects of suicidal tendencies, it is forbidden to use, but as a veterinary drug, it can still be bought in the veterinary drug market.

Listening to Officer Xu's introduction just now, I analyzed the medicine in their hands, it should also come from this person named 'Black Whale', but I estimate that 'Black Whale' is unlikely to deliver it to the door in person, I suggest that Captain Chu can check the records of these deceased people receiving couriers in recent months, to see if there is any courier from the same address, if there is, then this address is likely to be the address of this 'Black Whale', even if it is not accurate, it must not be far away. ”

"That's right!" Chu Qiancheng slapped his thigh, "This is really a good way, as long as you determine the city where this 'black whale' is located, and then go to all the shops that sell veterinary drugs in that city to check one by one, you will definitely be able to find this 'black whale'! Li Xian's kid is really right, Consultant Du really has a level!"

"There is a second point," Du Lin nodded with a smile, and accepted Chu Qiancheng's praise, "We have detected the composition of gasoline on all the deceased, and even some people have gasoline in their stomachs, and I looked at the photos of the scene, and I can also find through the burning marks in the fire that the amount of gasoline used is very large, and I heard from the armed police officer that it will not be less than thirty liters."

So much gasoline must require a large oil drum to load, no oil barrel was found at the scene, even if it is an oil drum made of PE material, there will be wreckage after burning, but it was not found at the scene, it must have been taken away by the person who locked the door at the end.

I have two suggestions for this, one is to track down the person who bought the gasoline barrel, this may be more difficult, but once the suspect is found, this can be used as reverse evidence; the other is to trace the source of the gasoline, so this person is not a native of Linquan, but if he wants to bring such a large barrel of gasoline from other places to Linquan is definitely not very convenient, and it is more likely to buy gasoline at the local gas station in Linquan.

As far as I know, real-name registration is required to buy bulk gasoline at gas stations, so we can check the local gas stations and get a list of recent gasoline purchases.

With this list, we can do a cross-comparison with the list of couriers and veterinary drugs above, which can easily help us identify suspects. ”

"It's a good way, Da Xu, can you write it down? It's a good way!" Chu Qiancheng laughed.

"Brother Dulin, what if that person doesn't buy bulk gasoline, but drives to refuel, and then pulls it out of the car's fuel tank?" asked Ji Ruoming, who was sitting next to him.

"Children don't talk much!" Du Lin reprimanded Ji Ruoming with a straight face.

Ji Ruoming pursed his mouth aggrievedly, Chu Qiancheng said before that his daughter was about the same age as Ji Ruoming, and when he saw Ji Ruoming being deflated, he felt a little distressed, so he opened his mouth to persuade: "It's a good thing for a child to have a strong desire to learn, and besides, this child will also have to be a forensic doctor in criminal investigation in the future, and learning more things now is also good for her growth." ”

Du Lin also felt that he was a little harsh on Ji Ruoming, so he touched her head to show comfort and apology.

Chu Qiancheng said to Ji Ruoming with a pleasant face: "Xiao Ji, Uncle Chu told you, now the average vehicle has an anti-theft oil design, and the fuel tank mouth is not directly connected to the fuel tank, but there is an 'S' shaped elbow, so even if you open the fuel tank mouth, it is impossible to stuff the oil pumping hose into the fuel tank." ”

"But when I watch TV, they can just plug in if they steal oil. Ji Ruoming said.

"Silly girl, it's all a lie on TV, there's no such gas tank in real life. Unless it's the fuel tank of a big truck, but the big truck burns diesel, our case is gasoline, two different things, understand?"

"Oh, I see. Ji Ruoming nodded obediently.

Chu Qiancheng seemed to be really talking to his daughter, like a loving father, which made the group of Linquan Criminal Police Team cover their mouths and snicker.

"What are you laughing at, and then have a meeting!" Chu Qiancheng saw everyone laughing at him, and quickly changed to a serious expression, but everyone laughed even harder, making Chu Qiancheng himself laugh.

In the Zhonghu Criminal Police Team, although Du Lin is an external "consultant", as long as Du Lin participates in the case, the investigation work is very smooth, so the people of the Zhonghu Criminal Police Team do not treat him as an outsider, and even his status is second only to Li Xian, and any latest progress will be reported to Du Lin in time.

But Linquan is not as good as Zhonghu, Du Lin is a veritable "external employee" here, except for Sui Yu'an, no one communicates the case with him, but Sui Yu'an is also a strange existence in the Linquan Criminal Police Team, she doesn't ask anything else except for the little thing on the autopsy table, so no one knows how far this case has been handled, and neither of them knows.

The autopsy work had already been completed, but the case was not over, and Du Lin couldn't talk about going back to Zhonghu, so he could only take Ji Ruoming around Linquan City with nothing to do.

Linquan City is named after the spring, the spring water is called the General Spring, it is in the town of drinking horses in the western suburbs of the city, according to legend, this spring is the place where the general of Wu Guo Lu Meng drank horses before the war during the Three Kingdoms, and it is also regarded as a place of scenic spots, so the town of drinking horses is the same as the Yongchuan Town of Zhonghu, it is a small town based on tourism, and there is an endless stream of tourists who come here to watch the spring water every year.

Du Lin and Ji Ruoming had nothing to do, so they said hello to Sui Yu'an, and then found a homestay in Yinma Town and opened two rooms to live in.

These days, it is just in time for the beer and food festival in Yinma Town, and there are many tourists, that is, Du Lin is rich now, and he found one of the most expensive B&Bs in charge of the family, only to find two empty rooms, otherwise it is really difficult to find a place.

During the day, I went to see the spring that has not dried up for thousands of years, I feel that it is not interesting, and I plan to go out to the food festival at night to take a look, although Du Lin does not need to eat human food, but for food other than blood is not excluded, Ji Ruoming is a snack goods, in the mountains of Qingzhou for more than ten years, I have long been tired of eating the food grown in the mountains, and now after returning to society, there is no resistance to all kinds of food snacks, and I just walked half a street on the food street to eat my small belly.

Durin also took a few bites, and found that there was still a considerable gap between the snacks on this "food festival" and the real street food in those ordinary alleys, and immediately felt a lack of interest, but the beer made on the spot still tasted good, with rich and delicate foam and full malt flavor, which was much better than those canned beers that had been sterilized.

At this time, Du Lin was strolling through the crowded streets with a glass of freshly brewed draft beer, followed by Ji Ruoming, who was full of snacks.

"Brother Dulin, look at that person!" Ji Ruoming pointed in a direction on the side of the road with a skewer of grilled squid in his hand.