Lu Chuan enlarged the details in the photos, comparing them with the indentation marks on the body in the case file photos.
"I asked yesterday, this kind of hook is not something an average person would use, they're mostly used by pipe repair workers."
"I think over in Liangzhou City, we could focus on this angle and try again, for instance, checking if there were any repairs on sewage channels near the crime scene back then."
Liu Guodong held the photo from the case file and the steel hook photo on Lu Chuan's phone. The more he looked, the more plausible it seemed.
"Hmm, I think they look quite similar. I'll report your findings to Captain Qin. Over in Liangzhou, it's still up to them."
Whether the case can be solved or not doesn't rely solely on one piece of information. Clues are just an opportunity, a breakthrough point.
After all, it's already a three-year-old case, and now only one detective who participated in the case back then is still following it.
