So why Wakita's fingerprint is suddenly needed?
Do Kuroda/Amuro wants to confirm that whether Wakita is a certain someone or not?
There are only two persons whose fingerprint can be lifted from the crime scene(Kohji case as that is very relevant)
Rum is a pro assassin so Rum won't leave evidence behind, so Asaka and Tsutomu are two very likely options.
So whether Wakita is Asaka suspect in NPA's eye or a Tsutomu suspect?
They want to.
Tsutomu is a pro agent so Tsutomu wont leave evidence/traces behind, so Rum and Asaka are two very likely options.
I mean... for story-development reasons its kinda clear that Rum is gonna be the target and rather not Asaka.
Furthermore: Rum failed, confirmed.
Furthermore: Since Rumi is ur Rum-pick atm:
Rumi is carrying the shogi stone with her. Does that look like a pro assasin to u, who is carrying the piece of evidence in her backpocket for everyone to see?
Still nice catch - Wakitas fingerprints will reveal that he was there 17 years ago.
As Rums underling, hopefully
Yes, the story development needs this because Wakita's fingerprints and the motivation of Kuroda/Amuro is a driver of this story, which implies it is very important for story development.(So why did you waste a sentence to showcase a trivial answer?)
I thought that you would only say Kohji killer.
Rum failed doesn't mean Rum's fingerprints would be around the scene.
Someone wrote the dying message "Carasuma" so the mirror will have fingerprints.
The dead man didn't write it because (writing the message, then throwing away the scissors and then picking up the shogi piece again and then getting the scissors.) sounds plain impractical and hilarious.
Rumi holding the shogi piece only proves to me that Rumi wants to catch the Kohji killer who very well might not be Rum but an important witness who had seen Rum, hence Rumi's interest.
Wakita is the person who is most likely to have created the message "CARASUMA" 17 years ago as someone had already stolen the shogi piece.
Plus why Wakita is bending his knees and neck to mask his true height.
Well that is a sign of a pro agent using a persona.