Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

“We have two security guards on duty 24 hours a day. Normally, everyone entering the site is required to register and wear an access pass. However, sometimes there are too many construction workers, and they come and go frequently, so the security guards might be negligent. Occasionally, some family members or friends of the construction workers enter the site without registering, but they usually only stay briefly and leave quickly,” Li Jianguo said. “I checked the security guard duty last night, and everything was normal; I didn’t find anything unusual. This afternoon, the security guards said they didn’t see any unfamiliar people entering the site, nor did they see any suspicious vehicles.”

"Where were you around 14 PM before and after the incident? What were you doing? Did you see or hear anything unusual?"

“Before and after the incident, I was in my office processing project progress reports. The office is located on the east side of the construction site, about 100 meters away from the material storage area. At that time, I was in the office the whole time and did not go out. I did not hear any unusual noises until I received a report from the cleaning staff, which is when I learned that a murder had occurred,” Li Jianguo said. “I can provide the office’s surveillance video to prove that I was in the office the whole time.”

"Is there anyone guarding the material storage area on your construction site? Do the construction workers usually go to the material storage area to rest?"

“There are no dedicated personnel to guard the material storage area, but construction workers usually go there to move materials, and occasionally some construction workers will go to the shady area of ​​the material storage area to rest during their breaks. However, around 14 p.m. this afternoon, the construction workers were all working in the work area, and no one went to the material storage area to rest, nor did I arrange for anyone to work in the material storage area.”

"Have there been any disputes at your construction site recently? For example, conflicts between construction workers or with outsiders?"

Li Jianguo thought for a moment and said, "The construction workers occasionally have minor arguments over work-related matters, but these are all small conflicts. There have never been any serious conflicts or fights. As for external personnel, we mainly have business dealings with material suppliers. There have been no disputes with them, nor have we had any conflicts with the surrounding residents."

Wang Shuai continued to question Li Jianguo about various related issues, including the construction progress, material procurement, and worker attendance. However, the information provided by Li Jianguo did not offer any useful clues pointing to the suspect or the deceased. Subsequently, Wang Shuai reviewed the surveillance footage from Li Jianguo's office and confirmed that Li Jianguo had indeed remained in his office before and after the incident, thus ruling out his involvement.

Next, Wang Shuai questioned the two security guards at the construction site, named Zhang Lei and Wang Hao. Zhang Lei was on duty in the morning, and Wang Hao was on duty in the afternoon. Wang Hao told Wang Shuai that he started his shift at 12 noon that afternoon and remained at the guard post at the construction site entrance. He did not leave the post and did not see any strangers enter the construction site. Only a few construction workers entered and exited the site, all of which were normal work-related interactions, and there were no abnormalities. He also stated that the entry and exit register at the guard post was indeed incomplete in some parts, mainly because construction workers entered and exited frequently, and sometimes there was not enough time to register them; it was not intentional omission.

Wang Shuai reviewed the surveillance footage from the guard post. The footage showed that between 12:00 PM and 2:30 PM, only a few construction workers entered and exited the construction site. No strangers entered, and no suspicious vehicles were parked around the site, consistent with Wang Hao's statement. Zhang Lei stated that during his morning shift, he did not see any strangers enter the construction site, did not notice anything unusual, and everything around the site was normal.

Subsequently, Wang Shuai and his team questioned the other 10 construction workers one by one. Most of these workers were migrant workers from different places who usually lived on the construction site and rarely went out. They all stated that they did not know the deceased, had never seen the deceased on the construction site, and that they were all working in the work area before and after the incident, had not left the work area, and had not heard or seen anything unusual. During construction, the machines on the site were very noisy, and they could not hear any other sounds.

During the questioning, Wang Shuai and his team carefully observed the changes in the expressions of each construction worker, focusing on their activities before and after the incident, whether they had any contact with the deceased, and whether they had discovered any suspicious persons or objects. However, all the construction workers' answers were basically the same, showing nothing unusual and providing no useful clues. Several construction workers stated that they occasionally saw some discarded items in the material storage area, but they had never seen any strangers or noticed any unusual traces.

In addition, Wang Shuai inquired about the construction workers' clothing and learned that all workers were wearing uniform blue cotton work clothes, which differed from the black and brown fibers found at the scene, thus initially ruling out the possibility of the workers' clothing fibers being the culprits. At the same time, Wang Shuai had all the workers cooperate in collecting their fingerprints, which will be compared with the suspicious fingerprints found at the scene to rule out the workers as suspects.

After nearly two hours of questioning, Wang Shuai and his team completed the questioning of all those present, compiling 13 interrogation records. However, they did not obtain any significant or useful clues pointing to the suspect or the deceased. All those questioned had clear alibis or did not exhibit any suspicious behavior, making it impossible to identify any suspects at this time.

Wang Shuai, carrying the interrogation records, arrived at the material storage area and reported the situation to Lu Chuan: "Team Leader Lu, the questioning of all those present has been completed, including the complainant Wang Xiulan, construction supervisor Li Jianguo, two security guards, and ten construction workers. They all stated that they did not know the deceased, had not seen the deceased at the construction site, and did not see any suspicious persons or vehicles or hear any unusual sounds before or after the incident. The fiber material of the construction workers' work clothes is different from the fiber material extracted from the scene. Their fingerprint samples have been collected and will be compared with the suspicious fingerprints extracted from the scene. Currently, no useful clues have been found, and we are unable to identify any suspects."

After listening to the report, Lu Chuan's expression remained serious. He looked up at the sky; it was already past 17 PM, the setting sun casting its last rays on the construction site, adding a touch of desolation to the gloomy area. He paused for a moment, then said, "It seems this case is quite difficult to solve. The victim's identity is unknown, the traces and physical evidence collected at the scene need further examination and comparison, and the questioning has yielded no useful clues. We must adjust our investigative approach and expand the scope of our investigation." (End of Chapter)