Jiang An pondered for a moment, his gaze never leaving the linear mark.
"I think this mark is very likely caused by the weapon."
"Both victims have multiple sharp force injuries, and these wounds must have been caused by some kind of sharp weapon."
"If the weapon was covered in blood during the attack, and accidentally touched the edge of the sofa, it might leave such a transfer mark."
Hearing this, Wan nodded thoughtfully, "You're right!"
"This mark indeed doesn't match the characteristics of a normal bloodstain."
"But..." He paused for a moment, "Even if this mark was left by the weapon, what does it prove?"
Jiang An didn't answer immediately, frowning slightly, clearly sorting through all possibilities in his mind.
At this crime scene full of doubts, the multiple wounds on the two victims indicate that the murderer used a sharp weapon.
And bloodstain analysis is undoubtedly the key breakthrough point in solving the case.
