Following Zhou Ning's gaze, the two of them looked over as well.
Indeed, on the inner side of the top of the doghouse, there was a dark brown trace with four fingerprint marks along the edge.
Without being told, Sun Gaotie hurried to collect the fingerprints. The angle was just right on the inside of the metal sheet, completely sheltered from wind and rain erosion, preserving the fingerprints quite intact.
Yang Xuetong compared the cement footprint and said to Zhou Ning excitedly,
"The shoe print left in the cement matches Chen Gang's footprint, and the pressure points are exactly the same. As for this bloodstain, I wonder if it matches the blood found on the broken ceramic shards in his house. If they match up, we can confirm it's Chen Gang's DNA."
Zhou Ning said nothing, but looked up at the top of the wall.
