If you let that line of thinking lead you astray, you'd lose.
Jiang Xia briefly marveled at the strange fate linking Doctor Kanda and Mouri Kogoro, then quickly lowered his head and continued pushing his Progress Bar forward. "After discovering that the victim had fallen from the building, Doctor Kanda rushed forward in grief and embraced him. Aside from confirming the victim's death, that action also gave you the chance to get blood from the fallen man on yourself.
"This allowed Doctor Kanda to use changing clothes as an excuse to separate from the police and return home. You quickly rearranged the furniture upstairs so no one would discover that your room had the same layout as the victim's room—the furniture in Room 601 mostly had wheels on the bottom, so it wouldn't have made much noise. The soundproofing here is also excellent, so you didn't disturb the police downstairs. When the owner came to deliver flowers earlier, you didn't open the door all the way because you were afraid he would notice you moving furniture around inside.
"In the café earlier, you seemed unable to stand the smell of smoke. But now, there's an Ashtray on your bedside table. It's clearly used often, and there are even several recently smoked cigarette butts inside—these should be things you casually brought upstairs when you moved the unconscious doctor Yoshida into your room. Familiar objects close at hand would make the victim, after waking up, firmly believe that he was 'on the fifth floor.'"
Jiang Xia gave Doctor Kanda no chance to interrupt and finished in one breath. "If the victim fell from your balcony, there should be plenty of fresh traces to collect here." Whether all of it would be enough to convict him was up to the judge, but even