Chapter 377: Chapter 344: Small Dosage

Jiang Yuan spread out some photos on the table and began to ponder them.

This was his usual method, as many of his backlog cases started with photos.

The other police officers in the room were either looking at the photos with him, doing their work, or taking a break to play on their phones.

Song Jinyou paid close attention to Jiang Yuan's expression and also stood up to take a look.

They were all photos they had seen before, some even taken by Song Jinyou himself. He wasn't sure if Jiang Yuan could discern anything new…

"I notice that there are quite a few people in the crowd of onlookers who appear repeatedly…" Mu Zhiyang ventured tentatively.

His conjecture was the simplest and most natural one. Not to mention criminals revisiting crime scenes, most people would take special interest in the progress of the investigation after committing a crime.