Spymaster
Plastic Paddy
In a hierarchy it's ok for some people to kill, but not others. What makes this crime so heinous in the eyes of the daily mail and its readers is that three people who serve the highest level of hierarchy were slain by someone at the lowest level. That sort of shit scares them.
I can't speak for DM types but for me what makes it so heinous is the fact that he viciously murdered 3 men in cold blood. The fact that they were coppers is neither here nor there.