The Greatest detective and the phantom thief

In this Au, Chuuya is a detective along with the rest of the Port Mafia, they are all working under the government to work on serious cases, like murder cases, high theft in robbery, and there leader is still Mori.
Dazai is part of a group called the 'Masked Phantoms', along with the rest of the ADA, some times they were involved in murder cases, but they are mainly involved with high theft in robbery. And they don't have any ability's.

One day, all detectives were called in for a meeting on a new big case....
and also these characters and victims, I just made up on spot
Also disclaimer
Blood
Detailed murders
I will try my best to do smut but I probably won't I focus to much on the story plot
Cannibalism (thanks Nikolai)
More cannibalism (thank you Fyodor)