Capítulo 1415: Chapter 1339: Distinguishing Fingerprints by Gender
Since we’re already here; it means that with the high-resolution spectral imaging equipment already delivered, it’s only right to collect more fingerprints.
One sheep or ten sheep — it’s about sending one criminal to jail or ten criminals to jail. Tʜe source of this ᴄontent ɪs NoveIꜰire.net
The person is dead; it’s about a victim who’s been killed, and the murderer shouldn’t live.
Liu Zhuangshi organized a team in one breath, each person carrying two evidence boxes to the conference room, presenting them for selection.
Huang Qiangmin led his team, familiarly setting up a relay station, and said, “Liu Zhi, it’s almost time to get off work, why not pick a few important cases first, let’s see if there’s anything suitable, and Jiang Yuan can see if there’s any breakthrough?”
Liu Zhuangshi gave a brief smile, not out of politeness; he restrained the urge to blurt out, “There’s no time for meals now.”
Unfortunately, Jiang Yuan wasn’t his. If Jiang Yuan were his, he would only — of course, use him sparingly, but if he were his, a chance to solve a murder case now, who cares about eating? Eating in the dirt and funding tests himself isn’t just rhetoric.
To use Jiang Yuan for as long as possible, Liu Zhuangshi, akin to a scoundrel, teased lightly, “How about getting off work first, giving Director Jiang a break? Once rested, efficiency will be better.”
“No need for that.” Huang Qiangmin answered on behalf of Jiang Yuan, saying, “Didn’t you just send out a large team here? There are still several teams on standby. If we make a breakthrough in a case right now, you deploy people immediately, tomorrow morning we could have preliminary conclusions, wouldn’t that advance things better?”
Liu Zhuangshi’s smile almost slipped. It seemed Jiang Yuan planned to get off work while his team was to work through the night. He thought “I am the scoundrel,” yet in the opponents’ eyes, he was merely hot-blooded sheep.
To manage his emotions, Liu Zhuangshi couldn’t help but pat his own face, internally warning himself: hold it together, even if you’re just a hot-blooded sheep, as long as the objective is met, it’s a victory!
Then, Liu Zhuangshi seriously said, “Commissioner Huang is right, it’s my oversight.”
“Not at all, not at all.” Huang Qiangmin was taken aback by Liu Zhuangshi slapping himself. He had seen many captains in the criminal police, but emotional instability was rare.
Huang Qiangmin hurriedly pulled Liu Zhuangshi’s hand, “Pick a case first, we’ll discuss other matters later. We’re not here for just a day or two. Tonight, you should investigate as needed, and if there are any breakthroughs tomorrow, especially significant ones, then it’s great, we can move to the next case. If not, we continue to mull over it, right?”
“Alright, alright… Thank you, thank you…” Liu Zhuangshi held Huang Qiangmin’s hand back, both showing the intimacy of close friends who could sleep with their feet together.
Huang Qiangmin gently patted Liu Zhuangshi’s hand, “We should also thank you. It’s because of your cases that Jiang Yuan got inspired to apply high-resolution spectral imaging for capturing the third-level features of fingerprints. Such an imaging device finding great use is beneficial for the entire forensic system…”
“That thing belongs to the provincial office.” Liu Zhuangshi lowered his voice. He got what Huang Qiangmin meant, but couldn’t promise what he didn’t own.
“Since you can use such technology, you can’t keep borrowing from the provincial office forever, right?”
“We’re talking about 500,000.” Liu Zhuangshi’s smile trembled.
“No need to buy such high-end configurations. One is certainly not enough considering your large criminal police brigade…”
“Our budget allocation for this year…”
“Allocations are just numbers, some get more, some get less, why is that? Part of the reason must be good performance, right? Those performing poorly might not even get this year’s funds tomorrow, not to mention, companies selling equipment don’t always ask for full payment, some don’t even need a deposit. Just sign and they handle everything perfectly…”
“Next year, we might not even have that much…”
“Who says you must repay next year? Plus, repayment can be spread over several years…” Huang Qiangmin eyed Liu Zhuangshi like a fresh puppy in finance, still thinking of doing things within budget, clueless about leveraging financial tools. Anyone with some grassroots experience knows in a relationship with installment payments, the period of installments surpasses the lifespan of the phone which outlasts the romance.
“But… but…” Liu Zhuangshi mumbled, lacking experience in such talks and actions.
Jiang Yuan ultimately chose an accidental injury case.
The case was fairly simple: during the selection of a campsite by the riverside, a conflict broke out. One side suffered a loss, with one person having a fractured knee joint and fully torn cruciate ligament, assessed as serious injury level two, and another having a piece of lip missing and six teeth knocked out, minor injury level one.
At this stage, had the other party chosen to surrender, the criminal police brigade wouldn’t be involved. The local police, or at most the district-level criminal police team, would have handled it.
However, the suspect decided to flee, elevating it to a case potentially requiring a sentence of over 10 years, necessitating investigation by the Anwan City Bureau Criminal Police Brigade.
But since the crime occurred outdoors, there was no surveillance assistance, and only the victim’s description was available. The investigation hit a bottleneck.
This case was one of the major cases of the year for the Anwan City Bureau, regardless of whether Jiang Yuan was involved, the Anwan City Bureau had to focus its efforts to solve it.
Of course, if Jiang Yuan could resolve the case, the pressure on the Anwan City Bureau would significantly reduce.
Liu Zhuangshi brought the victim’s jacket, an Adidas hoodie, with a long streak of blood trailing from the neckline. But since it was a fight first, then bleeding, the blood rendered any potential fingerprints unreadable.
Extracting DNA from the blood without any matches wasn’t surprising either.
Domestic DNA databases are far less comprehensive than fingerprint databases.
Collecting these fingerprints wasn’t too difficult for Jiang Yuan.
Especially with the high-resolution spectral imaging equipment, Jiang Yuan scanned a garment and managed to extract 1 whole and 2 partial fingerprints, each marked with core points or secondary features.
As before, if a match is found, they send someone to find the suspect and capture their fingerprint’s third-level features to further confirm identity.
The reason for selecting clothing is that material significantly impacts fingerprint collection. For instance, fingerprints on a wooden or metal tabletop could be retrieved by teaching a child, but a rounded table leg might stump many entry-level forensic technicians.
And items like coins, even experienced forensic technicians might struggle to extract usable fingerprints.
Clothing material varies, making fingerprint collection easier or harder. This jacket was relatively difficult, giving Jiang Yuan a chance to collect fingerprints previously unavailable.
In total, 12 fingerprints were collected, belonging to 8 different fingers.
Jiang Yuan focused on several fingerprints on the torso, as it was said a suspect had struck there.
Ultimately, Jiang Yuan chose two partial fingerprints and included them in this fingerprint defensive range, allowing smoking or non-smoking fingerprint experts to participate together.
Soon, after Jiang Yuan processed the third-level features of the fingerprints, he quickly deleted one of them.
Li Zemin had been watching the entire time, and after Jiang Yuan was done, he quietly asked, “Why delete one fingerprint?”
“Because it’s a woman’s fingerprint, and no women were involved in the brawl. Especially none of the opposing women touched the victim’s side.” Jiang Yuan replied.
“Once a fight breaks out, don’t the women help?” Li Zemin retorted, and then pat his head, “That’s not the point, how did you know the deleted one was a woman’s fingerprint? Can fingerprints show gender?”
“Yes, by the number of sweat pores. Women’s sweat pore density averages 13 per square centimeter, while men’s averages 9 per square centimeter, meaning women’s density is 1.5 times higher. Hence, we can preemptively delete women’s fingerprints on the scene and focus on the male suspect’s fingerprint.” Jiang Yuan explained as he continued working on the fingerprints.
The fingerprint experts still in the conference room, who had overheard Jiang Yuan’s explanation, chuckled and lit up their cigarettes.