Crime Scene Investigation office.
Lu Chuan's fingerprint comparison work also reached a critical moment.
Extracting fingerprints from rebar is inherently difficult, and the grassroots police officers involved in the case were not particularly skilled, which led to issues in the extraction itself.
This time, Lu Chuan not only improved the clarity of the fingerprints but also completed them.
Because of the special structure of the rebar, the killer left fingerprints only on the protruding parts, not the recessed areas.
Completing the fingerprints involves connecting each ridge line, a task that is quite labor-intensive, taking Lu Chuan over three hours to basically finish.
Focusing so intently and expending so much energy on a single fingerprint—Lu Chuan only spends this kind of time when dealing with a murder case.
Moreover, the environment is special, and there was no interference, allowing Lu Chuan to focus on his work alone in the underground lab.
