civil forensic

Chapter 1341: Family Extermination

Snapped!
Shen Yaowei slammed the documents on Wang Chuanxing's desk and said, "We've been waiting for half an hour, Brother Wang, let's hurry up. I'm really getting impatient."

"Is the suspect in such a hurry to die?" Wang Chuanxing joked, then shook his head when he saw Shen Yaowei didn't laugh. "Yaowei, you've changed. You used to have such a nice way of speaking..."

Shen Yaowei curled his lip: "Before, I was a 'connected' person, so of course I had to speak politely. Now I'm a technically skilled detective, I respect the law and physics..."

"You've got something," Wang Chuanxing laughed.

A criminal police officer from Anwan City Police Department was also queuing up nearby. Hearing the conversation between the two, he looked over with amusement and said, "Everyone else transitions from law and physics to relationships. Are you going down the wrong path?"

"Roads are made by walking," Shen Yaowei replied casually to the unfamiliar detective, thinking to himself: "If Director Jiang likes it, who do you think you are!"

quack quack...

Wang Chuanxing printed out a form for Shen Yaowei and said, "Your case has been transferred to the Nancheng District Bureau of Anwan City. Take this form, get it stamped in their office, and then send the suspect directly to the Nancheng District Bureau. Their office has your phone number."

"Why were they demoted?" Shen Yaowei was unhappy. The suspect he had worked so hard to catch certainly deserved to be brought back to a higher-level police station.

Wang Chuanxing laughed: "I thought it was just a few days ago? The situation isn't just good, it's not just great, it's absolutely fantastic! You'd better hurry up and go, or the district bureau will be overflowing and the suspect will have to be sent out of the city!"

"Alright. Um... remember to call me if you have any search missions." Shen Yaowei was also wholeheartedly trying to establish himself as a "search expert" within the team. Simply catching suspects was not only mindless but also rather pointless.

Wang Chuanxing readily agreed. With more cases being investigated, all sorts of needs arose, including quite a few search-related tasks. Aside from Shen Yaowei, most people didn't particularly enjoy these types of tasks.

After quickly finishing his paperwork, Wang Chuanxing hurried to the laboratory. He still needed to take care of Jiang Yuan; if he arrived late, Jiang Yuan might find someone else to serve him.

laboratory.

The two experts, Liu Changhe and Lin An, watched with anticipation as Jiang Yuan performed image enhancement on the computer.

Their expertise lies in fingerprint extraction techniques, particularly in using different methods to reveal fingerprints—simply put, they find ways to make fingerprints glow and then extract them.

This is naturally a very important technical means and one of the core elements of fingerprint technology.

However, obtaining fingerprints does not mean that the suspect can be found. This process requires complicated steps and superb skills. Otherwise, the two would not have rushed to find Jiang Yuan.

Ministries have many experts who are proficient in certain fields, but neither of them has the ability to integrate these parallel resources to serve them. In contrast, Jiang Yuan, who came from a grassroots background, has a more comprehensive range of technical skills. This is similar to the approach taken by technicians in companies. Technicians in small companies often need to be generalists, while technicians in large companies need to have expertise in a specific area to stand out.

Of course, versatile and highly skilled technicians like Jiang Yuan are rare in any industry. Therefore, even though Liu Changhe and Lin An were highly regarded within the ministry, after arriving in Anwan, they simply focused on working with Jiang Yuan.

They just want to use new technologies to solve a few major cases; nothing else matters.

Jiang Yuan was also recklessly experimenting with new technologies.

After completing the identification of six fingerprints in a row, Jiang Yuan cautiously yet boldly chose the major case "Cuiling 211".

This was a particularly heinous family annihilation case that occurred on the morning of the first day of the Lunar New Year six years ago. Zhang Guoyi, a medicinal herb buyer from Cuiling Township, Fangshan City, and his family of four, including Zhang Guoyi and his wife, their 15-year-old son, and their 68-year-old mother, were murdered with a sharp blade in their own villa.

Because of local custom, people don't visit each other on the first day of the Lunar New Year, and they only start visiting each other on the second day. Therefore, the bodies of Zhang Guoyi's family were not discovered until the morning of the second day.

It is well known that the period around the Lunar New Year is when revenge killings and family annihilation cases occur most frequently. When the laughter of one's enemy's family can be heard, one's own anger will be more intense, more painful, and more unrestrained than usual. For a murderer who has been plotting to commit a family annihilation, the Lunar New Year is also a convenient time.

The police naturally followed the direction of the revenge killing. Zhang Guoyi, a medicinal herb buyer, frequently traveled between the surrounding villages, and had quite a few economic disputes and competitors. He was also not a good-tempered person and had offended quite a few people.

After an investigation, no suitable suspects were found. The Lunar New Year holiday, while convenient for revenge, also made it easier for suspects to provide alibis. The suspected individuals were released after only one round of interrogation.

This case thus became the first major case of the new year, yet it remained unsolved. Subsequent investigations suggested it was most likely a robbery-murder, but this conclusion only hastened the case's fading into obscurity.

Jiang Yuan chose this case for two reasons. First, "Cuiling 211" was a heinous crime and a well-known major unsolved case in Pingzhou in recent years. Second, the murderer left several blurry but obvious bloody handprints.

Bloody handprints primarily came from curtains and towels. This is also a common scenario for murders committed with knives.

Friends who have never killed anyone often think of a clean and efficient murder when they are planning a case, leaving without leaving any trace. But when they actually put it into practice, they will realize that such a perfect situation is not easy to achieve, especially killing four people in a row. Not only is it a test of the murderer's physical strength, but also, just imagine how slippery your hands are covered in blood.
Those who know how to conserve their strength when stabbing someone are considered experts.

Why do some knives have handguards? While European swords may have a need for close-range defense, the handguards of Chinese swords are simply to prevent the wielder's fingers from slipping onto the blade, or to prevent the wielder from thrusting the hilt in as well.

When people are excited, they are prone to using excessive force. Murder is probably an extremely excited situation.

On the other hand, victims who are stabbed or slashed may initially be afraid, but once they are armed with knives and swords, they will inevitably struggle before they die, and it is common for them to fight each other for the knives.

Therefore, when it comes to actually killing someone with a knife, not only will there be blood everywhere, but imagining wearing latex gloves is not only unrealistic but also makes one vulnerable to being killed in self-defense. In comparison, the cotton gloves commonly used by forensic doctors are somewhat better.

However, if it is a serial killing, after killing the second person, even a smart novice murderer should realize that it is necessary to take off his gloves and wipe his hands clean.

Unfortunately, the criminal investigators in Pingzhou were unable to find the suspect's fingerprints or DNA on the bloodstains found on the curtains and towels used for wiping at the scene.

After carefully examining the photos in the case file, Jiang Yuan felt that there was quite a glimmer of hope.