Chapter 1020 - 955 Dawn_2
Jiang Yuan simply pulled over a whiteboard and drew the shape of a keyhole on it, then marked a few dots and said: "We disassembled the lock because, in my opinion, there were too many scratches inside the keyhole, exceeding the level of a normal lock. Of course, this judgment is based on experience... Next, we took a wide range of samples, and then we could see that the presence of various metal elements inside the lock was beyond the normal range."
If a young technician had said this, it would definitely be hard to convince others, but when Jiang Yuan said it, Liu Jinghui immediately followed his line of thought.
"Let me get this straight... The metal elements you mentioned, are they brought in by the key, not originally part of the lock?" Liu Jinghui quickly grasped the important point.
Jiang Yuan nodded: "Elements like chromium and nickel are at least not part of the lock itself. But, there are also no typical traces of technical lock picking inside this lock. So, it can be understood that they were brought in by the key."
"But beyond the normal range? Exceeding what should be the normal range?"
"Exceeding the range of the keys for that lock." Jiang Yuan said, then suddenly slapped his forehead: "Is it a newly made key? But that’s not right, a newly made key wouldn’t leave so many traces..."
"Wait, let me think this through!" Liu Jinghui was very interested in any new clues and thought aloud: "Could it be that the newly made key was actually bigger than the original key, so it probed deeper, and the traces it left were also deeper?"
"Hmm... It’s not entirely like that, but there’s another point: a newly made key is also rougher, and even though the person cutting the key would polish it, if there are many fine grooves and ridges, they can’t be completely smoothed out with careful polishing, so it takes a few tries before it fits better..."