"That way, the next time the victim wiped his hands with a tissue, the poison would get onto his hands. Then, when he shaped the sushi, it would transfer onto the sushi, be swallowed, and ultimately kill him."
After Jiang Xia finished speaking, he noticed Blue Hat's face twist, as though he wanted to say something. So Jiang Xia beat him to it. "Are you about to say that you don't have any poisoned wet wipes on you, so you can't be the one who poisoned him?"
Blue Hat: "..."
His line had been ruthlessly stolen. He froze for two seconds before slamming the table indignantly. "That's right! You're slandering me!"
Yet the cold sweat on his forehead and the tremble in his voice had already exposed his nervousness and guilty conscience.
Jiang Xia studied him for a moment and sighed faintly. Perhaps there were too many people around; this was not a good place for a detective to be silenced. There was no extra Killing Intent to collect from Blue Hat.
The fake detective immediately lost the motivation to keep tangling with the suspect and said simply:
"That poisoned wet wipe is probably in the food-waste trash can by now. The sushi plates here have identification codes printed on their bottoms. Once sushi has sat on the conveyor belt for too long, an automatic recovery device pushes the plate off the belt.
"When the victim collapsed, everything around him was in chaos. The murderer took out one of the plates he had used earlier, put the wet wipe on it, and covered it with sushi. When the plate reached the collection slot, the machine discarded the poisoned wet wipe along with the plate. It wouldn't remain on the conveyor belt, leaving behind evidence."
Inspector Otaki listened to Jiang Xia,