The dusty past of the first criminal investigation department

After the two left, Old Tan turned to the smoking worker with a hippie smile and said, "Qiangzi, borrow a fire."

Qiangzi lit a cigarette for Lao Tan with a lighter, but he cursed: "You iron cock, you don't even want to buy a lighter, what are you smoking? Where is the lighter you picked up?"

Old Tan took a puff of cigarette, exhaled the smoke contentedly, and said, "I've been out of breath for the past two days, and I can't fire anymore." At this point, Old Tan reacted violently, and said, "That place is where I will In the past, none of you have been there, who would leave the lighter there?"

Qiangzi smiled and threatened him, "Maybe it's the murderer, I'll let you be a scapegoat then."

Old Tan was stunned for a moment, he was really frightened, he came to his senses and ran after Feng Chen and An Mu, "Comrade policeman, I have something to say."

Qiangzi just said casually, teasing Lao Tan, and seeing Lao Tan's frightened appearance, he laughed loudly, "You are less courageous than a mouse."

Old Tan trotted all the way to catch up with Feng Chen and An Mu, and said out of breath, "Comrade police... I... I have something... to hand in." Old Tan took a deep breath before continuing, "That's it. Yes, on the day when it rained heavily last month, I went to take a tarpaulin to cover up a batch of steel bars that arrived the day before yesterday, and then I picked up this lighter." As he said, Lao Tan took out a lighter that was out of gas and handed it to Feng Chen, " There was a pile of tarpaulins piled up in that place, and usually only I would go there to get the tarpaulins. People on the construction site would generally not go there. I think this may have been left behind when the murderer stole the tarpaulins. I handed it in .”

Feng Chen was about to say thank you for his cooperation, but Lao Tan said with a sad face, "I'm exhausted with the evidence, will I be arrested and jailed too!"

An Mu chuckled, quickly waved his hands and said, "No, no, we still want to thank you for your cooperation."

Lao Tan was relieved when he heard what An Mu said, and then turned around and ran back to the construction site. What if the police comrades change their minds and want to arrest him, it's better to run away as soon as possible.

Just after getting in the car, Feng Chen received a call from Bai Yumo. Bai Yumo said that he knew what the murder weapon was. Feng Chen sent An Mu to cooperate with Qin Yang before rushing back to the bureau.

Bai Yumo showed Feng Chen the tablet, "This is a simple model made by my friend. She said that the murder weapon should be a very strong wire with a diameter of no more than 1mm. I didn't detect it at the broken neck of the deceased. It is made of metal, so it should be some kind of synthetic fiber, such as nylon. Pass the wire around the neck of the deceased, and pass both ends into this hand-twisting rope tool, so that the handle is turned clockwise hard, and the rope in front becomes less and less. The neck of the deceased was strangled. I just took the rope and gestured on Xiaobai's neck, and it was indeed similar to the incision on the neck of the deceased."

"Where can I buy this tool?"

Bai Yumo shrugged, "It seems that it is not easy to buy. My friend said that this kind of manual tool is too inefficient and has been eliminated more than ten years ago. It should be hard to find now. Maybe some people have it, making ropes The company probably bought this game as scrap iron.”

Feng Chen nodded, "I'll send a message to An Mu and Qin Yang to let them pay attention, by the way," Feng Chen took out a lighter and handed it to Bai Yumo, "This may be the colorful strip of cloth that the murderer stole from the construction site and left it at the scene Yes, it was exhausted by the workers on the construction site, and there must be no fingerprints left, so let’s keep it for now, maybe it will come in handy.”

Bai Yumo took the lighter and stuffed it into the pocket of the white coat, and continued: "Also, the things found in the stomach of the deceased, the analysis results came out, are spices, including cumin, fennel, chili, etc. Besides cumin, other They are all ground into powder. Since cumin is not the kind of whole grain, it is the kind that is knocked into coarse particles. Before the deceased died, he should have eaten something like barbecue. There is no toxic substance, so it can be concluded that he was not poisoned dead."