The Forensic Doctor Better Than a Detective-Chapter 141 - 131: Midnight Fire

"The key is, there’s rapeseed oil on the hands, which makes acting inconvenient."

"Especially for this kind of murder, the killer used a dagger, and the handle is made of metal."

"With a metal handle like this, having rapeseed oil on the hands would make it easier to slip, wouldn’t it?"

Li Jian listened and nodded gently. "What you say makes a lot of sense."

"According to our regular habits, if there’s grease on the hands, it would be washed off first thing."

Wan thought for a moment and patted the steering wheel.

"It’s like sometimes after eating chicken feet and duck necks, I always wash my hands right after, there’s no way I’d touch anything else with greasy hands."

After hearing this, Li Jian furrowed his brows.

"If we look at it this way, what problem does it indicate?"

"Could it be that the killer just happened to come in contact with rapeseed oil while preparing to commit murder?"

Jiang An nodded.

"Mr. Li, that’s actually my thought."

"I deduce the killer intended to commit murder."

"It’s just that when they saw the victim Liu Jun that night, there wasn’t time to wash off the oil, and they proceeded to carry out the murder."

Li Jian leaned against the pillow, slightly narrowing his eyes.

"The victim, Liu Jun, was at the construction site every day, not appearing there by chance."

"Why was the killer so anxious, unable to wash off the oil on his hands, to kill that night?"

Wan turned his head with curiosity towards Li Jian.

After a long silence, Jiang An spoke in a deep voice: "The victim Liu Jun was indeed at the construction site every day, but he didn’t drink and dine out every day."

Suddenly, Li Jian opened his eyes and turned his head towards Jiang An.

"You mean the killer saw Liu Jun had been drinking that night, and then committed murder?"

Jiang An nodded.

"The victim Liu Jun was very strong, his height and weight exceeded ordinary people."

"So this strength disparity led to the weapon being seized by Liu Jun and thrown away during the crime."

"Perhaps this disparity in physical strength is the best explanation for the murder that night."

Wan turned his head and asked, "Junior, what do you mean?"

"Ordinarily, it’s understood that drinking reduces physical resistance."

"The killer might have thought that was the perfect time to kill him."

After hearing Jiang An’s explanation, Li Jian pondered for a while.

"Jiang An, this explanation of yours makes a lot of sense."

"In this case, the urgency for the killer to commit the murder that night might indeed be due to that gathering and drinking session."

Wan asked, "However, the people at the gathering have mostly been cleared of suspicion; do you mean the restaurant owner?"

After a moment, Li Jian said, "Not just the restaurant owner."

"Anyone who knew about Liu Jun drinking that night could be the killer."

"Boss! I get what you mean."

Wan asked confusedly, "But! It’s impossible for a random passerby to see Liu Jun drinking and want to kill him, right?"

Li Jian said, "Of course not, there must be a strong motive."

"In this world, there’s no love without reason, nor hatred without cause."

Jiang An replied, "I think we can approach it from two angles."

"Firstly, focus on investigating those who saw Liu Jun at the restaurant or construction site that night."

Wan asked, "Mr. Li, the guys drinking with him in the dorm that night are very suspicious."

"I think we can bring them back for a good interrogation."

As soon as he finished speaking, Jiang An said in a deep voice, "Actually, I now feel the other dorm mates of Liu Jun are not highly suspicious."

"Oh? What do you mean?"

Hearing this perspective, Li Jian’s heart skipped a beat.

Jiang An continued, "The killer deliberately chose to act after the victim had been drinking."

"It must be based on the belief that alcohol would significantly affect resistance."

"But from understanding the other people in Liu Jun’s dorm, Liu Jun only had 2 glasses of white liquor that night."

"For Liu Jun, even 4 glasses wouldn’t be a problem."

"So, this is far from enough to get him drunk."

"The others in the dorm know best about Liu Jun’s state after drinking."

"If the killer were someone from the dorm, they’d surely know that the alcohol had no effect on Liu Jun’s resistance that night."

"Isn’t this a major contradiction?"

After a moment, Li Jian nodded.

"Hearing you say this, it does make a lot of sense."

"The victim’s blood alcohol level wasn’t high, and others reported Liu Jun appeared very sober at the time."

Then, Jiang An said, "Therefore, I believe the killer should have seen Liu Jun drinking that night."

"And the killer mistakenly assumed the victim’s resistance diminished due to alcohol and carried out the murder plan."

Two minutes later, Li Jian said, "Makes sense."

"Once we’re back, we’ll immediately investigate everyone present at the restaurant and construction site."

"Particularly from the construction site’s entrance to the communal dorm, everyone potentially encountered must be screened one by one."

Meanwhile,

Chen He and Zhang Yean drove back to the Jiangcheng City Bureau.

After parking the car, Zhang Yean said, "Mr. Chen, I’m going to check the results of the fingerprint fuming in the lab."

"Let’s go! I’ll go with you!"

"That evidence is too crucial, if we can find matching fingerprints, we might crack the case immediately."

Soon after, the two arrived at the trace evidence analysis laboratory.

Zhang Yean put on gloves and opened the fingerprint fuming chamber.

Zhang Yean placed the fumed dagger under a strong light for careful observation.