Upon hearing this, Mr. Zhang grinned.
"Looks like we old comrades are falling behind. We don't know much about these new public security technologies."
At this moment, Mr. He also had a smile on his face.
With Jiang An's method, he felt the pressure on him had eased considerably.
Otherwise, blindly searching for bloodstains on a sandy area would indeed be too difficult!
An hour later, the group returned once more to the front of Building 1 in the development zone.
Mr. Zhang raised the caution tape and went inside.
The six individuals arrived at the sandy patch on the first floor.
Jiang An surveyed his surroundings and noted the strong light from the stairwell window.
However, using Blue Heart Reagent to reveal bloodstains requires a dark environment.
He then turned and said, "Mr. He, please find a shade cloth and block out this window."
"Shade cloth? For what?"
Mr. He looked surprised.
"The conditions for Blue Heart Reagent to show require darkness."
