Things to be drawn from the write-up.

It seems that Haudegan was killed by the brother. It may be a leap of faith, but the fact that the head was stuck on a spear, may mean that he found Manfredo? If so that means that there is no possibility of a pro-town vigilante.

Husar seems to have been killed by the Yakusa (Martial Arts) so we know Taketski is still around. We also know that he has to kill everyone, so there may not be an ulterior motive for having Husar as a target.

I'd suggest that Rythmic was the detective. I'd imagine the detective as a religious and polite guy. I'd guess a Carelli killing, a professional job, but if my first theory above is wrong then it could also have been Manfredo.

Finally, the nervous guy and Pevergreen. I need to check this against what happened in thread. If Pever insulted someone, they'd definitely be on the list of suspects, the theory about it being Axel would seem to be the best atm.