Chen He and Zhang Yean drove to Wu Juan's residence once again.

However, the first thing Wu Juan asked upon seeing Chen He was, "How is my husband?"

Chen He answered softly, "Your husband Chen Feng didn't get into a fight with anyone, rest assured!"

Wu Juan sighed deeply after hearing this.

"That's good! Otherwise, how could I manage two kids alone?"

Seeing her emotions slightly calm down, Chen He gave Zhang Yean a glance.

Zhang Yean immediately understood.

"Sister, we're here to verify a matter with you this time?"

Relieved to hear her husband was alright, Wu Juan raised her head and said, "What do you want to investigate?"

Chen He stood up, lit a cigarette, and walked straight out.

Zhang Yean asked, "Sister, this question might involve your personal privacy, please understand."

Wu Juan nodded lightly.

"Have you ever had a sexually transmitted disease before?"

Wu Juan froze on the opposite side, lifting her head in some surprise.

After hesitating a little, she shook her head.

"No!"

Zhang Yean said again, "Please answer truthfully!"

"This concerns your husband Chen Feng's personal freedom."

At the mention of Chen Feng, Wu Juan immediately became nervous.

"What do you mean?"

"What does this have to do with my husband Chen Feng?"

"I haven't had such a disease!"

Zhang Yean nodded, "Now, you just need to answer my questions truthfully."

Wu Juan reaffirmed, "I honestly haven't had such a disease, if you don't believe me, you can check at the hospital."

"The sexually transmitted disease I mean isn't syphilis or AIDS, but HPV infection, commonly known as genital warts."

After a moment, Wu Juan recalled, "I remember when we first started at the worksite, there was a female worker in logistics who had genital warts."

Upon hearing this, Zhang Yean asked, "The logistics worker?"

"What's her name?"

"Li Lan! At that time, she was working in the cafeteria on the site, she's a bit younger than me."

At this time, Chen He finished a cigarette and walked in as well.

Zhang Yean said, "Mr. Chen, she said there's a woman named Li Lan at the site who had genital warts."

Surprised by the words, Chen He asked, "How do you know?"

Wu Juan answered, "We both went to the public bathhouse outside for showers. I inadvertently saw some blisters on her below."

"At the time I was curious and asked her, she told me."

Chen He and Zhang Yean exchanged a look.

"When was this?"

"About half a year ago, it was quite cold then."

Chen He took out a notebook and noted down this critical clue.

"Is Li Lan still working at the site?"

Wu Juan said, "When I left, she was still working in logistics, but I'm not sure about her current situation."

Chen He nodded.

"Do you know Li Lan well?"

"We were just coworkers at the site, not much familiarity."

"Can you tell us what you know?"

"She's 2 years younger than me, her husband died in a car accident the year before last, and she came to work at the site through an introduction from people in her village."

"Are her fellow villagers also at the site?"

Wu Juan nodded.

"I remember one seemed to be working as a security guard in the security section."

"What's that person's name?"

Wu Juan lowered her head in thought for a while, "Sorry, I can't remember."

"Does Li Lan know Liu Jun?"

Wu Juan pursed her lips, "Liu Jun is always flirting with women, can't keep his eyes off them."

"I heard Li Lan say that Liu Jun even actively pursued her."

"Did they get together?"

"That, I'm not sure about, it's someone else's privacy after all."

Finally, Chen He stood up and said, "Thank you for your cooperation."

Wu Juan stood and asked, "That officer just said, Chen Feng is still detained by you guys."

"Can I assume my husband won't have any problems?"

Chen He said, "The innocent are innocent."

"As long as your husband Chen Feng didn't do anything illegal, I believe the law won't wrong him."

Subsequently, Chen He and Zhang Yean drove away from Wu Juan's house.

Meanwhile.

Li Jian, Wan, and Jiang An were on their way back from the provincial city.

Wan asked, "Mr. Li, now that we know the type of grease on the rebar, where should we investigate next?"

After contemplating for a long while, Li Jian said, "The grease identification result is indeed a very crucial clue in our investigation process."

"We just discussed who might come into contact with the grease, but this range is still too broad."

"Anyone who cooks at home might come into contact with rapeseed oil."

Wan nodded.

"Exactly!"

"Rapeseed oil is not like machine lubricants or engine oil."

"Those two types of grease at least suggest a connection with vehicles, reducing the scope significantly."

"Rapeseed oil, on the other hand, is found in every household."

Li Jian sighed.

"This is precisely why the case investigation is challenging moving forward."

"Although it's a very good clue, using it is still slightly tricky for us at the moment."

After a slight pause, Li Jian turned to look at Jiang An.

Jiang An was sitting in the back seat, turning to look outside the car.

The green plants along the highway were continuously flying past backwards.

Noticing Jiang An was deep in thought, Li Jian asked, "What are you thinking about so deeply? What's on your mind?"

Jiang An suddenly turned and smiled.

"Mr. Li. I was thinking about why the perpetrator didn't clean the grease off their hands before committing the crime."

"Based on our life experience, if there's grease on our hands, we would usually choose to clean it off immediately."

"Previously, we discussed that people who come into contact with grease include chefs, rapeseed oil sellers, and people who eat vegetables."

"But would they really keep rapeseed oil on their hands?"

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