331: Chapter 299: Short Hair with a Scar 331: Chapter 299: Short Hair with a Scar Everyone had tasks at hand, except for Wang Bo.
With no work to do or assigned tasks, he silently took out his phone, snapped a few photos, and sent them to the work group chat.
In the work group, forensic and on-site technical staff had been dying of curiosity.
Seeing new messages, especially about a newly discovered fingerprint, they were instantly shocked.
Fingerprints meant there was a possibility of directly identifying the murderer.
It was bewildering to everyone how such crucial evidence could have gone unnoticed and then been found.
Li Yuanliang: “The fingerprint Jiang Yuan found?
Somewhere we missed scanning?
Wang Bo then sent another photo showing the position of the fingerprint.
It was at the bottom of the window frame, which should be a fairly obvious location.
Li Yuanliang: “We missed scanning that?
Wang Bo: “It’s a quickly pressed fingerprint, not very noticeable.
Jiang Yuan used toner from a laser printer mixed with magnetic powder and brushed over it several times before it came out.
When I first saw it, I also felt it was miraculous, as it didn’t quite look like the normal fingerprint powdering.”
Wang Shouming: “Can brushing reveal such detail?”
Wang Bo: “At first, there was hardly any trace.
But after a second brushing, a bit of the fingerprint appeared.
You need a forensic light to see it.
After focusing on brushing it two or three more times, it gradually became clearer.
This was my first time seeing such a method.”
Normally with fingerprint dusting, you sprinkle the powder, and the fingerprint appears.
If it’s not clear, it’s usually because there’s not enough powder sticking to it, so you just add a bit more and that’s usually enough.
But with the fingerprint using printer toner mixed with magnetic powder, you had to brush it three or four times, even four or five times, and it would gradually become clear.
This method was something Wang Bo had neither seen nor learned before.
Changyang City’s work group fell silent.
It took a while before someone spoke up again:
Li Yuanliang: “I asked an expert.
They said laser printer toner has a density close to that of copper and aluminium powders, with a weight falling between aluminium, copper, and magnetic powders.
It also has a magnetic property slightly weaker than magnetic powder, mainly due to its inherent electrostatic magnetic property.
It can be used alone or mixed in different ratios with magnetic powder according to seasonal and environmental changes, making up for the loss of small particles during prolonged dusting…
What the hell, dusting has to consider the season and environment?”
Wang Shouming: “Can’t be true, right?
If it’s that useful, they should have provided us with it in our investigation kits.
Why make such a fuss?”
Li Yuanliang: “I’m just quoting the expert verbatim, not my own words.
The exact quote from the person is: ‘If you’re not an expert, using printer toner will backfire.
If someone is proficient enough to use toner, just kneel down and shout long live.'”
Wang Shouming: “Which expert talks like that?”
Li Yuanliang: “My uncle said it.”
Your uncle is right, long live, long live, long long live!”
Wang Bo’s head was already swelling from what he was seeing.
Although the people chatting in the work group were colleagues, and they had supervisors in the group, Wang Bo couldn’t help but carefully choose his words before speaking up.
Wang Bo: “When I was in school, the professor taught us not to dust multiple times.
They said that if the results are satisfactory after one or two dustings, it’s okay.
But if not, multiple dustings can easily smudge the lines that have already appeared or result in a completely black mess.
Only in extremely dry conditions are multiple dustings allowed…”
Wang Shouming: “Xiao Bo, although I don’t understand this stuff either, let me add something.
Theories are good to know, but watching the experts work and shouting 666 is the safest bet.”
Li Yuanliang: “Don’t lead the young people astray.
This issue is worth discussing.
I also looked up some information just now…
The method Jiang Yuan used requires complicated ratio mixing.
Forget about it, what I think is key here is why he would repeatedly dust the windowsill.
Did he find something?
Wang Bo: “He found footprints.”
Wang Bo then went on to describe the situation as it unfolded after Jiang Yuan arrived.
The technical and non-technical staff in the work group all fell silent.
The footprints Jiang Yuan found didn’t need dusting.
It should be said that they were right there, but nobody had thought to look down from the window due to the abundance of footprints everyone saw.
The second floor of the colored steel house was about the same as a normal second floor, with a height of around 3 meters.
Investigators checking the second-floor room wouldn’t have expected the murderer’s escape route to involve jumping through the window.
No eyewitness had been reported until now; the main door was wide open anyway.
The murderer had walked in normally, killed the cashier normally, so why not leave through the door normally?
Li Yuanliang: “Something unexpected must have happened.
Otherwise, if the murderer had left normally through the door, he wouldn’t have left behind fingerprints or footprints, at least not ones that could be distinguished.”
Gao Long: “But isn’t murdering the cashier an unexpected event?
Normally, one wouldn’t think to kill.”
Li Yuanliang: “Was it excessive agitation?”
Wang Shouming: “Being agitated is normal; anyone involved in a robbery would have accelerated adrenal secretion.
If it were common, that would be too terrifying.
There shouldn’t be such hardened criminals around now, right?”
“Xiao Bo,” He Guohua called out, jolting Wang Bo, who had been engrossed in his phone, back to awareness.
“Yes, I’m checking what they’re saying in the group.” Wang Bo quickly offered a smile to his master.
He Guohua said seriously, “You take Jiang with you to investigate the car and turn on the computer.”