Also, my read on one of the scenes where Katiguri has a revelation, was that he realized it WAS the investigator/special prosecutor, whatever?
because she would have had to duck?
but then she got reassigned, and the interpretation seemed to be that because of corruption she was transferred away, due to the shift in power?
They were making it seem like the lady detective was crooked, but the latest episode seems to indicate that she was actually a good cop, and the officer sitting in the back gave the info to Tozawa's hitmen.
That's the reason why he ducked, and it's also why the hitmen had a clean shot without hitting anyone else in the car.
Someone further up in command ordered her to be transferred. The commissioner also warned Katagiri that the lady cop didn't know how things were run in the department, and warned him about going against the grain.
So we're seeing that the Yakuza has completely infiltrated the PD.