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Chapter 26: Fingerprint Developing Agent
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Chapter 28: Suspect Locked In
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... . It was a secret technique from an old professor when I was in college, specially used for developing water-soaked fingerprints."
Lu Chuan had no way to explain the source of the skill, so he attributed this fingerprint developer to the old professor.
"But this developer also has a drawback, which is that the developing time is short, only about ten seconds."
"So, we need to record the entire process, and each fingerprint must be photographed within ten seconds!"
...
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