Fingerprints are like fine wine to drunkards, and the best brand in a club is to old people. You will never forget the wine you tasted, the sheets you rolled on, and the fingerprints you saw.
For dry fingerprint inspection, no one has a backlog of cases or fingerprints that failed to be compared. When encountering a case, the fingerprint comparison cannot be completed for a while. Some fingerprint examiners want to carry it in their arms. When others are swiping their mobile phones in the toilet, they swipe their fingerprints.
Each fingerprint is like an identity mark, with its own different characteristics. Just like a person's figure, some fingerprint papillae are relatively flat, like an airport, and some are broader, like undulating mountain peaks.
Some fingerprint ridges are soft and thin, like the waist of a willow leaf, while some are thick and thick, like a bucket. In the eyes of ordinary people, fingerprints are just messy thick lines, but in the eyes of fingerprint examiners, every fingerprint that is studied and played with has its own life.
In front of the autopsy table, Lu Chuan changed his position and carefully observed the half fingerprint extracted from the tape mark on the deceased's ankle.
"Did you find anything?" Shen Yan was also very happy that Lu Chuan could find this fingerprint. Forensic doctors don't really study this when doing autopsies.
Whether it is forensic pathology or forensic anthropology, it either studies how the corpse died or who the corpse is, but it all starts with the corpse itself.
To be honest, extracting fingerprints from corpses is a bit of a composite talent. Ordinary forensic doctors cannot do it, nor can ordinary trace examinations.
"I feel like this fingerprint is familiar... but I can't remember where I've seen it before. I'll go back to the office and have a look in the system after I finish it." The fingerprints made by Lu Chuan have all been compared in the system, regardless of success or failure. , are all recorded.
As long as you retrieve these fingerprints and compare them, you should be able to find out.
"Let's collect trace evidence first, and then send it to the provincial department after we finish it." This time, the trace evidence inspection progressed faster, and the results found were similar to the last corpse.
In addition to the physical evidence collected from hidden parts such as fingernails and mouth, similar hair was also found on the second corpse.
"This should be the hair of an animal, most likely a dog or a cat, but of course it is not necessarily a dog or a cat." Lu Chuan agreed with Shen Yan's judgment: "There are such hairs on many parts of the two corpses. , indicating that the deceased should have been exposed to this kind of hair frequently during his lifetime."
"Is it possible that it was left on something that was wrapped around the body when the murderer dumped it?"
"This is also a possibility. The murderer couldn't have left the body naked like this. It should have been wrapped and covered with something, but the specific situation depends on the test results." There are obviously many possibilities for guessing the hair.
But no matter which one, you need to wait for the test results to come out.
"You should rest first. We just finished dissecting the body and helped me with the trace evidence test. I will hand over the things first and then check the fingerprints." Beside the autopsy table, the two of them went back and forth several times. Shen Yan's physical exertion was indeed Very big.
There were fine beads of sweat on his forehead, clinging to a few strands of hair.
"Okay, then you go and do your work. I'll go back to the office and take a rest." The two separated, and Lu Chuan quickly returned to the field survey office.
"Master, this is the trace evidence collected from the second corpse." Handing the evidence box to Liu Guodong, Lu Chuan immediately sat in front of the computer and started typing on the keyboard.
Liu Guodong, who was just about to deliver the physical evidence, looked at Lu Chuan who was busy: "Let's take a rest first. This case is not making much progress now, and it is probably a protracted battle." But Lu Chuan shook his head: "No, Master, I was just collecting trace evidence." At that time, it was discovered that there were glue marks left on the wrists and ankles of the corpse after being bound with tape." Liu Guodong nodded. The glue on these marks has been collected. After analysis, it can be determined what kind of tape the murderer used. some value.
"In addition to these, this time, half a fingerprint was found on the glue mark on the left ankle of the corpse." Huh?
"Half a fingerprint?" Lu Chuan's words surprised Liu Guodong. If fingerprints were found on the body, it was most likely left by the murderer.
Yang Sen and Lao Bai also gathered around: "Were fingerprints found on the body?"
"This is a big discovery. It is most likely left by the murderer." Lu Chuan spoke while operating the computer and retrieving the fingerprints he had seen before: "The fingerprints were found on the tape marks on the inside of the corpse's left ankle. .”
"It's very possible that it was left behind when the murderer removed the tape."
"And this half of the fingerprint feels a little familiar to me. I feel like I've seen it somewhere before..." Snap! Lu Chuan's typing on the keyboard stopped, and what was displayed on the screen was the fingerprint identification analysis record that Lu Chuan had done half a month ago.
A slightly distorted but very clear fingerprint appeared on the screen.
"That's it!" Half a month ago, while investigating Song Kun's murder case, Lu Chuan took some time off to conduct an identification analysis on the fingerprints submitted by the police station and the criminal police brigade.
At that time, there were a total of twelve sets of fingerprints, nine of which were successfully identified, and there were three more sets that were not successfully identified because there was no matching object in the system.
After that, the matter of these three sets of fingerprints was dropped, but after all, Lu Chuan had carefully processed these fingerprints.
Time has passed not long ago, so the impression is quite profound.
"That's it!" Lu Chuan pointed to one of the three sets of fingerprints that had not been successfully identified at first: "That's it!"
"Match it and see if it works!" Liu Guodong said in an excited tone. This is definitely a key clue.
Although the fingerprint itself has not been successfully compared, the cases involved in this fingerprint can be retrieved.
When the time comes, if you follow the clues, you may make new discoveries. While Liu Guodong was speaking, Lu Chuan was already preprocessing the fingerprints collected from the corpse.
It's one thing to look familiar to yourself, but it's another thing to put it into the system for comparison. There is only half a fingerprint on the corpse, and there are many ridge segments. In fact, the identification and analysis of this fingerprint is still very difficult.
At least, with the strength of Liu Guodong, Yang Sen and Lao Bai, they probably won't be able to handle it. But in front of Lu Chuan's advanced fingerprint identification and analysis skills, this somewhat blurry half fingerprint looked like a dancer without clothes.
Naked in front of you, no secrets at all. Within ten minutes, the feature points were marked and the relevant data were calculated.
Ding! The system immediately issued the familiar sound of a successful complete match.
"It's done!"
"It's really done!" Yang Sen and Lao Bai shouted excitedly. At this moment, Liu Guodong was still holding the trace evidence box that Lu Chuan had given him. Looking at the successful comparison report on the computer screen, his mouth broke open: "I'm going to report the good news to Team Qin. Xiao Lu, you have made a meritorious service this time!"
