1995, Starting as a Criminal Investigation Expert

After Qian Rui and his group inspected the crime scene of Sun Xiaohui, they headed towards the workshop courtyard in a large group.

Li Shu and his companion followed.

After hearing Wang Ze'an's account of the case, I felt extremely heavy-hearted.

According to Wang Ze'an's description, the suspect's target was very clear: children who were capable of going home on their own after school.

More importantly, it wasn't just one or two cases, but a total of forty-three.

Those were forty-three tragedies that destroyed forty-three families.

In the previous five years, Zheng Cheng had five cases, plus the Yang Luxiang family annihilation case, Sun Xiaohui was killed, and six people were killed and six were injured. Li Shu felt that this person had become very crazy and extremely vicious.

Compared to the suspects in the Anjing case, they are nothing but small fry.

"By the way, what's with these handlebar grips? Is it the suspect's vehicle?"

Li Shu countered with a question.

If it's a means of transportation, why was it abandoned?

Furthermore, since even the means of transportation were found, didn't they also find the suspect?

Secondly, what is the blood? Why would there be bloody fingerprints? Was it murder?

Finally, the fact that the suspect committed more than forty crimes in a row without being discovered indicates that he had developed a mature modus operandi.

Why did it fail, and why were the means of transportation left behind?

They didn't deal with it either; it couldn't have been ignored like Zheng Cheng did.

Wang Ze'an's tone lowered slightly as he said, "To be specific, although the suspect has been committing crimes relentlessly, he has never used lethal force."

"However, on June 19th of this year, the last case, an accident occurred. The victim's father had to leave work early because he had to go on a business trip the next day."

"When he got off work, the suspect had just subdued the victim. When the adults came home, it was like they had him cornered in the house. This guy was really bold; he managed to keep the suspect hidden inside the closet."

"Unfortunately, he suffocated to death."

Li Shu's heart sank.

Wang Ze'an sighed and continued, "This accident interrupted the suspect's crime. He hurriedly cleaned up the scene and fled in a panic, which was witnessed by the family's neighbors."

"The neighbor saw him carrying a bag out of someone else's house, looking flustered, so he questioned him loudly. Then he saw the suspect ride away on a bicycle."

"At that time, the case had been going on for two years and had caused quite a stir in the city. Many people knew about it. That's why the neighbors were so vigilant and immediately went downstairs to investigate."

"But we didn't react in time, which gave the suspect a chance to escape. We later confirmed through our investigation that the man rode his bicycle to the nearby No. 44 bus stop. Just then, the bus arrived, so he parked his bicycle at the bus stop and took the bus away."

"Route 44 is an express bus that circles the Second Ring Road. There were many people on the bus, so no one paid attention to the suspect. All we know is that the suspect got off after two stops, and we don't know where he went after that."

Li Shu frowned slightly and asked what was wrong with the blood.

It wasn't death by suffocation.

Wang Zean said, "When the suspect was controlling the victim, the victim's nose bled, which meant the blood flowed onto his hands."

"The suspect fled the scene in a panic afterward, probably without time to wash it with water, and as you know, even if you wash it with water, it's difficult to get it completely clean."

"There's one more thing. We questioned the witnesses carefully, and they said the suspect wasn't wearing gloves when he fled. So theoretically, it's possible that fingerprints were left on the door and door handle."

"Unfortunately, firstly, a lot of people came in, which should have contaminated the fingerprints on the doorknob. Secondly, we also confirmed with luminol that there was no blood reaction on the doorknob."

"Let's analyze this. This person probably opened the door with their left hand, and only their right hand was stained with blood from their nose. In that case, there's a very high probability that the handlebars would have left bloody fingerprints."

Li Shu nodded, and based on Wang Ze'an's description, he imagined the scene at the time and felt that their analysis was correct.

Since you're bleeding from your nose, your hands will definitely get stained when you cover them.

"Oh, right."

Li Shu was somewhat puzzled and said, "Since the witness saw that the suspect wasn't wearing gloves, didn't he leave any fingerprints when he searched for valuables in the previous forty-plus cases?"

It's not just one or two cases; with so many, there must be some cases that have been missed.

Wang Ze'an said quietly, "Actually, he was wearing gloves when he committed the crime, and fingerprints were not successfully extracted from the previous crime scenes."

That's all he said.

Li Shu was stunned for a moment, then quickly realized what was happening, and his mood became even heavier.

Wang Ze'an smiled bitterly and said, "You should know that it's extremely difficult to extract fingerprints from clothing or skin, even if they're just sweat fingerprints. That's why in so many cases, we haven't been able to extract fingerprints that we could compare."

"We have plenty of biological samples like DNA, but they're useless. You can't possibly draw blood from every man in the city and test their DNA."

Li Shu nodded, and was about to ask another question when Xu Qiang called out to him from the front.

Having arrived at the scene, Qian Rui wanted to inquire about how Zheng Cheng was discovered.

Li Shu quickly stepped forward and recounted the entire process.

Qian Rui nodded repeatedly, especially after hearing that Li Shu had also fired a shot to stop Zheng Cheng from escaping, he praised him and said, "Well done!"

After all, Li Shu wasn't a criminal police officer, so it wasn't easy for him to be on the front lines and face vicious criminals like this.

At that time, Li Shuzhen just hid in the distance, did nothing, and no one blamed him.

After all, Zheng Cheng had submachine guns and grenades.

The group entered the courtyard.

Tan Guoxiong approached Li Shu and asked in a low voice, "What's wrong?"

He was familiar with Li Shu and could clearly sense that Li Shu was not in high spirits and had a serious expression.

One can't help but worry that returning to the scene might trigger painful memories.

"It's alright."

Li Shu shook his head, his mood actually affected by the case Wang Ze'an had mentioned.

This person is a beast; he's not even human.

Thinking of this, Li Shu lagged a few steps behind and came to Wang Ze'an's side.

"Researcher Wang, I'm willing to go to Anjing. How about we leave tonight? I remember there's a train to Anjing tonight."

Why wait until tomorrow? Let's go now.

Every extra day that such a beast lives and breathes is a form of pollution to the world.

Wang Ze'an's eyes lit up, and he knew exactly what had prompted Li Shu to change his mind.

"Thanks."

He patted Li Shu on the shoulder.

Regardless of whether it ultimately succeeds or not, whether fingerprints can be extracted and the suspect identified, Wang Ze'an should express his sincere gratitude to Li Shu for his determination.