The second body is a male, forty-three years old, 1.78 meters, left-handed. Based on the corrosion of the chain, the killer discarded the body around a year to a year and a half ago. Lu Chuan needs to conduct some experiments to determine the exact time.

Regarding the left-handed judgment, Lu Chuan doesn’t need to explain, as Sun Jian and the others are not idle. The left hand of the second body is noticeably larger than the right, which is the opposite of what is generally seen.

The size of an adult’s hands is not the same, which is not innate but rather a result of different postnatal development due to the varying frequency of use of the two hands.

The vast majority of people are right-handed, with the bone gaps and development level of the right hand being broader than the left hand in daily life.

If there is an opposite situation, it is highly likely to be a left-handed person.

Because the body has been soaking in water for a longer time, the degree of liquefaction is greater, and the smell is more pungent.

The work of Crime Scene Investigation and the forensic doctors continues, and the other members of the Major Crimes Unit remain busy.

In old unsolved cases like this, the most crucial task is determining the source of the bodies.

Once the identity of the body is determined, further work can proceed.

After the discovery of five body bags, whenever Lu Chuan provides the basic information of a body, the Major Crimes Unit immediately conducts checks within the list of missing persons.

The identity range of the first body was quickly narrowed down.

"Eight months ago, a missing persons report was filed for Su Mo, female, height 1.62 meters, 26 years old, from Haizhou City, who worked at the Good to Come Again Massage Shop."

Wang Song quickly locked onto the target within the missing persons information database.

Generally, the age and height of a missing person have unique attributes. With these two pieces of information, if the person has been reported missing, the information can likely be found.

Autopsy room.

"Confirmed, the identity of the first body is Su Mo, who went missing eight months ago, a masseuse at Good to Come Again."

Sun Jian looked on with a complex emotion at Lu Chuan, who continued to conduct the crime scene investigation in front of the fifth body bag.

Dammit, this is the gap.

The person can gather so much information just by looking, while this forensic team...

Nowadays, they say that your defeat isn’t from a peer, but most likely from another field.

Unexpectedly, this also applies to the forensic world.

"Brother Sun, give me a hand; this chain is new and hard to handle."

Among the five body bags, besides the first body’s determination to be eight months ago, the second body was discarded within a year to a year and a half ago, the third for a long time, five years ago but not exceeding ten years.

The longer the time, the lower the precision of judgment. The longest soaked is the fourth body bag, over ten years.

The most recent is the fifth body bag; the chain has not rusted yet, estimated to be only one to two months old.

Information keeps flowing to Li Donglin, and each piece weighs heavier on his mind.

The killer’s timeline spans too long.

Ten years!

Additionally, the methods and techniques of body dismemberment seem to have improved over time.

Only the torso of the third body shows saw cut marks, while the limbs were chopped with an axe.

The longest interred fourth body showed no saw marks at all, entirely dismembered by axe.

Clearly, the killer’s method is gradually evolving, becoming more proficient over time.

This type of suspect is the kind police least want to encounter, as they commit so often, passively accumulating vast experience, becoming a developing suspect.

Determining the identity of the first body was easy, but further progress on the four remaining bodies proved laborious.

"The killer likely executed the murders in different places, because if so many people were killed in one spot, they would have been discovered, right?"

It was a forensic doctor from the Criminal Investigation Team in Liangzhou City speaking, a middle-aged man with a high forehead, bright eyes, slightly balding.

"I think this guy killed five people... No, at least five people, is certainly a pervert."

"Do you think the killer might reside nearby? Otherwise, why dispose of five bodies here?"

This question...

In Lu Chuan’s mind, he nodded. All five body bags were found within the same cross-section of the river, and the timeline spans over ten years, indicating the killer likely lives nearby and is accustomed to disposing of bodies here.

Moreover, if it weren’t for the Wang Family River’s hydroelectric plant construction and subsequent water level drop, these body bags would never have been discovered.

Perhaps, this would have become an unsolved case for centuries.

The Wang Family River didn’t dry up; the bodies weren’t found, and the killer would remain at large.

Oddly enough, he could continue killing and quietly dispose of bodies here again.

"The killer dumped the bodies in the deeper water areas of the Wang Family River; the fast-flowing currents mean fishermen typically avoid it, showing it was a carefully selected spot."

"Hmm, over ten years without discovery, if I were the killer, I’d continue disposing of bodies here."

Forensic doctors discuss case developments while preparing bone separation.

Unveiling the fifth body bag was somewhat comforting to the forensic experts.

The body was in good condition; although extremely bloated, it hadn’t decayed.

The cause of death was clear, a knife wound in the back, repeatedly stabbed, leading to death.

This excited Lu Chuan; the knife wound not only confirmed the cause of death but also provided clues about the killer.

"The stabbing from behind shows the victim likely didn’t suspect the killer, suggesting familiarity."

Sun Jian glanced at the wound, quickly offering his judgment.

Other forensics nodded too, acknowledging it as common sense.

Killers typically have motives; random killings, although they occur, are rare domestically.

Experience and insight suggest stabbings from behind usually indicate an attack by someone known, catching the victim off guard.

"The victim is male, height 1.82 meters... wound is three centimeters below the back heart, knife wound entrance..."

Lu Chuan opened the wound for careful examination. Despite being swollen from river water, the wound shape still hints at its direction.

"Thrust at a downward angle, the killer likely held the knife overhead with both hands, stabbing from above to below, estimating..."

Lu Chuan analyzed while mimicking the motion.

Raising his hand above his head, he struck down fiercely.

"That’s the angle!"

"Given the victim’s height... the killer’s height likely ranges between 1.73 meters to 1.80 meters, with considerable strength, an adult male."

These metrics...

Sun Jian exchanged glances with others, finding it a bit enigmatic.

Of course, everyone understood this principle: based on the wound’s angle and victim’s height, you can estimate the killer’s height range.

However, theoretically possible, how exactly to calculate?

We are forensic doctors, not math experts.