"Ding!"
"Advanced mission: Based on the matching fingerprint information on the corpse, identify the suspect in the corpse dumping case at Qinghe Playground and assist the task force in solving the case." When the fingerprints were successfully matched on the computer, the system mission prompt sounded in Lu Chuan's mind. .
Criminal Investigation Detachment No. 1 Conference Room.
"The fingerprints found on the corpse?" Qin Yong was overjoyed at what Liu Guodong reported. Fingerprints can be left on the corpse, and they are left on the tape binding marks on the ankles. In this case, there is a high probability that they are the fingerprints of the murderer.
Sure enough, the most reliable thing is the on-the-spot survey.
"Did Lu Chuan find it?" Liu Guodong nodded: "Just now, Lu Chuan found this fingerprint when he was collecting trace evidence from the second corpse." On the projector, it was the photo of the fingerprint found by Lu Chuan.
"It can be regarded as a coincidence. When investigating Song Kun's case, Lu Chuan once conducted a fingerprint identification analysis, which was a case submitted by the subordinates."
"Three sets of fingerprints were not successfully identified at that time, and there was no target in the fingerprint database."
"But Lu Chuan had an impression of those fingerprints. After seeing the fingerprints on the corpse, he felt familiar." Qin Yong nodded in approval. The fingerprint inspection criminal police identified and analyzed the fingerprints, just like frontline criminal policemen catching fugitives.
The entire Haizhou City Public Security Bureau arrests suspects due to various accidents basically every year.
For example, last month, two policemen from Youhao Road Police Station were eating beef noodles in a restaurant after their shift, and they felt that a diner they were eating noodles with looked familiar.
I secretly took photos and asked my colleagues in the office to check. Sure enough, there was a burglary suspect on the loose. In fact, the two police officers had only seen the photos in the joint investigation report two weeks ago, and they felt a certain sense of familiarity with them.
As a result, we met him unexpectedly. After checking and confirming, he was arrested. Liu Guodong switched the projection, and a set of files appeared: "Although the matched fingerprints have no identity information, they do have relevant information about the case." The fingerprints involved an arson case.
"Three weeks ago, an arson case occurred in the jurisdiction of Huaguang Street Police Station." The details of the case were displayed on the projector.
"The fire was in an archive of a water company."
"The water company's archives database?" Qin Yong looked through the files in his hand carefully, feeling a little confused. This case is actually not a big one.
The information in the archives is all the project settlement and final accounts information of the water company. In terms of importance, it is of some value to the water company, but in terms of economic value, it is just a bunch of money from selling waste paper.
After the report was made, the Huaguang Street Police Station sent personnel to investigate the scene and found gasoline residue. It was confirmed at that time that someone should have set the fire on fire.
Arson cases, regardless of the value involved, will receive a certain degree of attention.
"After the case was filed, the Huaguang Street Police Station investigated for two weeks, but there was no clue." The engineering information archives room was deliberately set on fire, and the purpose was definitely not for money.
Of course, the Criminal Investigation Detachment has not encountered this kind of thing before. It is not necessarily an outsider who sets the fire, it is also possible that one of the people sets the fire, and it is quite high.
Project data is the basic data for project audits. It is possible that some people from the water company may have tampered with the project and then burned the data to create a completely unconfirmed case.
However, when this case occurred, it was the time when the whole government was fully committed to investigating the murder of Song Kun.
It received relatively little attention, and basically no police force was invested. Even when two police officers went to collect a vague fingerprint, Huang Qiangmin, the director of the Huaguang Street Police Station, did not come forward.
And because the value of the case was of little value and the arson did not cause any personal injury, the case was dropped. But now, the fingerprints found in the case are linked to the naked body found at the Qinghe Amusement Park construction site, and the nature is different.
"Let's go to the arson scene." It is much easier to investigate an arson case than a serial murder case.
Now, as long as the arson case is solved, the fingerprints related to the naked corpse case will also be found. 4:28 p.m.
At No. 28 Huaguang Street, the water company has a single-family two-story building here. It was the first floor of this building that was set on fire.
Huang Qiangmin was making a report: "The fire was not big at the time. After the smoke alarm was triggered, the automatic sprinkler system started." The fire protection facilities of the small building are relatively complete, and there is an automatic sprinkler system in the archives room.
"But because the arsonist poured gasoline on it, basically all the files were burned." Lu Chuan had already begun to conduct an on-site survey of the arson scene.
The scene was very chaotic. On the one hand, when the fire broke out, the sprinkler system was activated, which destroyed the traces left by the arsonist.
On the other hand, someone should have cleaned up the scene after the fire. Now, the entire scene is pitch black and the water stains on the ground have dried up, making it difficult to make any major discoveries.
"Yang Zi, where were the fingerprints collected at that time?" The policeman who collected the fingerprints at the time turned out to be Lu Chuan's college roommate Yang Lin: "On the gasoline barrel." Yang Lin turned on his mobile phone: "We found it at the scene at that time A gasoline barrel, fingerprints were found at the bottom of the barrel." This happened last time when Yang Lin and Lu Chuan were having dinner, they were chatting, and Lu Chuan casually talked about some small methods of fingerprint collection.
"I just used the over-the-top fingerprint collection method you mentioned last time. How about it, buddy? Are you okay?" Yang Lin was having a great time at the Huaguang Street Police Station recently.
Now there is a hint that the Huaguang Street Police Station is dedicated to on-the-spot investigation. Since Yang Lin and Lu Chuan often talk on the phone and chat on WeChat, they occasionally talk about fingerprint collection.
Lu Chuan often told Yang Lin some tips and methods. Although it is not a systematic knowledge, it is enough to meet the needs of general on-site situations.
Yang Lin's fingerprint collection at the arson scene is an example. Although it is not very clear, at least it is not adhered with tape.
The fingerprints can be analyzed for subsequent identification.
"Is that gasoline barrel still there?" Yang Lin nodded: "It's at the police station. I took it back that day." This is because he came from a major and subconsciously had a rigorous attitude towards the case.
There was nothing left to see at the scene, the footprints on the ground were messy, and it was unknown how many people had come in and out after the arson.
The entire site has been destroyed without any value. Twenty minutes later, Lu Chuan saw the gasoline barrel from which Yang Lin extracted fingerprints at the Huaguang Street Police Station.
It's said to be an oil barrel, but it's actually a blue paint barrel. It was just temporarily filled with gasoline.
"Has the source of this barrel been investigated?" This is the only evidence that has been preserved in the arson case, and it is also the only thing that may leave clues to the suspect.
