Not the only, but one of the larger factors that determines whether a particular type of crime is suppressed or not --
Do the people that have the ability to suppress the crime, have the desire to do so?
I think that the word action is more appropriate than crime in this case. I see it for creativity in schools, drug laws, whistleblowing, and many other areas beyond what one society or another happens to define as a crime.
I've got an ambient spacey up-tempo techno music playing loudly in my headphones as I work, so I can't hear what's going on around me.
But I certainly see it, and now I remember why I always used to get a table here facing the front glass of the restaurant, not facing towards the back.
There's a TV here. It's on. And the news is playing.
I'm in one of the safest cities in the world, Taipei, and yet it's constantly running through crime, criminals, muggings, break-ins... I don't know exactly, my Chinese wouldn't be good enough to understand each story if I could hear the TV.
Which I can't, because of the techno.
Actual life was chaos, but there was something terribly logical in the imagination. It was the imagination that set remorse to dog the feet of sin. It was the imagination that made each crime share its misshapen brood. In the common world of fact the wicked were not punished, nor the good rewarded. Success was given to the strong, failure thrust upon the weak. The Picture of Dorian Gray