The crackdown on organized crime began with the arrest of the mother-in-law.

Chapter 822 Is the suspect the biological daughter?

"Which day exactly?" Qin Chuan leaned forward slightly, his gaze fixed on the old man, gesturing for Li Ming to take notes. The old man frowned, trying hard to recall, "It was probably the day of the heavy rain. I remember clearly. Because of the heavy rain, I was going out to collect the laundry when I heard strange noises coming from the cellar. I was so scared that I rushed back inside." The old man suddenly coughed violently, and a neighbor quickly handed him a glass of water. After drinking the water and calming down, the old man continued, "What a disaster, this house is haunted..."

That's how elderly people in rural areas are; sometimes they'll associate these cases with supernatural or ghostly things.

However, this case is still quite strange.

Wang Jianjun moved away six months ago, but has recently been associated with the cellar, which must be hiding something.

Qin Chuan continued, "And Wang Jianjun's daughter, the timing of her return is also suspicious. Investigate Wang Jianjun's social connections, especially those in the construction industry, and see who he has been in close contact with recently. In addition, Wang Jianjun's daughter's communication records and recent whereabouts must be investigated in detail; no detail can be overlooked."

Back at the police station, in the forensic lab, Qin Chuan stood before the microscope, staring intently at the soil sample, his brow furrowed. "These dark red particles are iron oxide," he said.

Contrary to initial expectations, the dark red mud on the wheels was not actually stained with blood, but rather with iron oxide.

He told the forensic investigator beside him, "Judging from the purity of the particles and the morphology of the crystals, it likely came from a construction site. Moreover, the composition of this iron oxide is unusual; it's not something naturally present in ordinary soil. It's very likely produced during the processing of building materials." He turned to the investigator and asked, "What are the test results for the mud on the tricycle tires?"

"It contains the same components, as well as a small amount of concrete residue." Zhao Xiaowen handed over the report, pointing to the data and saying, "Based on our analysis of microorganisms and trace elements in the soil, the tricycle recently drove on an unpaved road. Judging from the plant debris carried in the soil, it may have been near the South Suburb Industrial Park. There are several construction sites there, and the soil environment there is quite consistent with the description."

“South Suburbs Industrial Park…” Qin Chuan repeated softly, quickly sorting through various clues in his mind. “Li Ming, lead a team to the South Suburbs Industrial Park tomorrow to investigate, focusing on construction sites where people have recently gone missing or behaved abnormally. At the same time, contact the surrounding monitoring management departments to retrieve surveillance footage from the past month near the industrial park to see if there are any suspicious persons or vehicles.”

At the case analysis meeting, the conference room was filled with smoke, and the projector continuously switched between photos of the cellar scene and various investigation data. Qin Chuan stood in front of everyone, his expression serious, and slammed the case file heavily on the table, saying in a loud voice, "This is a typical case of a crime committed by someone known to the victim. The murderer was familiar with the terrain, knew the cellar existed, and had a means of transportation to bring the body here. Judging from the traces at the scene and the modus operandi, the murderer had a certain level of counter-surveillance awareness." He pointed to the autopsy report: "The ligature marks on the neck indicate that the murderer was right-handed, the binding method was professional, and there is a high possibility that the perpetrator had a criminal record. The stomach contents tested positive for sleeping pills, indicating that the victim was drugged and murdered before death, and the entire crime was meticulously planned."

Zhang Lin continued, "Through further autopsy, we discovered abnormalities in the deceased's internal organs, which may be related to the type and dosage of sleeping pills. We are conducting a more detailed analysis of the stomach contents to try to determine the specific type of sleeping pills, which will greatly help in tracing the source of the drugs." She held up an evidence bag: "The DNA on the button does not match the deceased's and has been sent to the database for comparison. In addition, judging from the material and workmanship of the button, it is a common industrial product, but the scratches on it are distinctive, which may lead to clues by investigating relevant garment factories."

In the interrogation room, Wang Jianjun's daughter, Wang Yutong, sat in a chair, her eyes darting around, her fingers fidgeting with the hem of her clothes. Qin Chuan and Li Ming entered the interrogation room and sat opposite her. Qin Chuan keenly observed Wang Yutong's every move, noticing fresh scratch marks on the inside of her wrists, as if she had been scratched.

"When was the last time you went home?" Li Ming's voice was as precise as a scalpel.

Wang Yutong looked up at Li Ming, then quickly looked down again. After hesitating for a moment, she said, "...Last Wednesday." She suddenly coughed violently, as if she had choked on something. "My dad said he needed to deal with the things in the cellar and told me not to go in."

"What are you dealing with?" Qin Chuan's gaze suddenly sharpened as he stared intently into Wang Yutong's eyes. Wang Yutong's eyes flickered, avoiding Qin Chuan's gaze. "I don't know!" She stood up abruptly, her emotions running high. "I don't know anything!"

There are currently no direct clues pointing to whether Wang Jianjun's daughter is the murderer, but she appeared overly agitated during questioning. Some issues seem more complex than they appear at first glance. Whether Wang Yutong is indeed the murderer of her own father requires further investigation.

After the inquiry into Wang Yutong yielded little progress, Qin Chuan immediately arranged for the Criminal Investigation Detachment to carry out further follow-up work.

The main focus is on tracking and investigating clues obtained from on-site investigations and physical examinations.

Li Ming led a team of criminal investigators to the South Suburb Industrial Park, attempting to find clues related to the case at several construction sites based on their previous analysis of soil samples. Meanwhile, Qin Chuan decided to further investigate the social relationships of Wang Jianjun and his daughter Wang Yutong, intuitively sensing that the key to solving the mystery lay hidden within.

Li Ming and his team arrived at the South Suburb Industrial Park, where machines roared and dust filled the air. Construction was in full swing at various sites, with workers busily moving about. Li Ming and his team first went to the project office of a large construction company. After explaining their purpose to the person in charge, the person in charge immediately summoned the site's security personnel and relevant management personnel to cooperate with the investigation.

"Have you noticed any suspicious individuals appearing near the construction site in the past month? Or any workers disappearing without a trace?" Li Ming asked seriously, scanning the crowd.

A security guard scratched his head and hesitated before saying, "It seems like there was something like that. About two weeks ago, I saw a strange man loitering outside the construction site fence, acting suspiciously. I went over and asked him, and he said he was looking for work, but he couldn't explain why, and then he left."

"What does that person look like? Does he have any special features?" Li Ming pressed.

"Hmm... medium build, wearing a black jacket and a baseball cap pulled low, so I couldn't see his face clearly. Oh, right, he walked with a slight limp, and his left leg seemed a bit weak." The security guard tried to recall.

Li Ming recorded this information in detail and then asked other people, but everyone said they had not found anything unusual.