There's a saying I first heard from cops in my country and then later saw pop up in several TV shows, the last one clear in memory being The Rookie.
The saying embodies that whenever cops decide to group together to the point of getting a symbol or name for said group, it's only a matter of time before they go to jail.
In corrupt countries, they may not actually go to jail, but the point is that whenever cops do this, criminality will always ensue.