Conan frowned at Doctor Date—he had actually noticed that too.
Combined with Date Yu suddenly reaching out to wipe his button after Conan had pointed out that it was loose...
Conan couldn't help clicking his tongue in regret. When Date Yu killed the victim, the victim had likely struggled and tugged his button loose.
In other words, the button had originally borne the victim's fingerprints, but now they had been wiped away.
"..." I really shouldn't have spoken so quickly... Conan couldn't help feeling a little regretful.
Beside him, Date Yu stiffened slightly when his clothes' color was suddenly pointed out.
But he quickly calmed down again. "Yeah, I do like dark blue and black. What's wrong with that? Plenty of people in the station are wearing coats in those colors."
He looked perfectly composed. But beside him, Doctor Sato seemed to have suddenly thought of something.
He secretly glanced at Date Yu, and cold sweat quickly appeared on his forehead. He could only keep wiping it with a handkerchief.
Conan spotted it sharply and immediately struck up a conversation. "Mister, you're sweating a lot."
"Ah, ah?" Doctor Sato jumped, clearly feeling guilty. He stammered, "I'm a bit overweight, so I usually sweat easily..."
"Hmph, Sato, there's nothing to hide." Date Yu, beside him, instead looked utterly justified.
He looked at Doctor Sato and said frankly, "Just tell them—you're sweating because you suddenly remembered that Doctor Utsumi and I had an argument yesterday, so you think I had a motive to kill him, right?"
Without waiting for Doctor Sato to speak, he continued on his own, "But as far as I know, that Utsumi guy offended plenty of people. If we're counting it that way, I'm far from the only one with a motive for murder."
"Is that so?" The