The trust of people on the forces of law and order is directly proportional to the number of crimes there are in an estate.
In the big cities, where it's easier to witness a crime, people usually have less confidence.
The policemen are humans and do a special work in which they could put their life at risk.
For this reason a lot of them try to avoid to take any risks at expense of the success of their work.
And when they put on their uniform, can only see themselves as police officers first and then as person.
They try to maintain a distance from everyone.
Worse still law turn out to be inefficient in many cases even when proof of guilt is evident.
Certain criminals don't flinch at being arrested.They know they can get away with it even though the crimes are among the most atrocious, like the violence against children.
Many raped girls don't trust in justice or are frightened to report.