"Is there any trace evidence here?"
"It doesn't seem obvious to the naked eye, but using magnetic powder will reveal it."
Immediately, Zhang Yean took out a black box and a brown brush from the toolbox.
She held the brush in one hand, dipped it in some magnetic powder, and brushed the lower section of the door frame.
Two minutes later, Zhang Yean suddenly exclaimed, "It's coming out! It's coming out!"
She was as happy as a child, "There are two sets of fingertip touch marks appearing on the lower section of the door frame."
Jiang An glanced at it and, through the distribution of the fingertip marks, his brain reconstructed the position and posture at that time.
Zhang Yean put down the tools, gesturing back and forth.
"These fingertip marks are only half a meter from the ground."
"Under normal circumstances, our fingers don't touch this position."
Jiang An nodded slightly.
"Precisely because of this, these fingerprint marks are very valuable."
