The criminal classes are so close to us that even the policeman can see them.

Some contacts with the local criminal classes might also be useful.

Is the penal system broken and creating a criminal class?

Either the criminal class had all been killed off or they now ran the government.

Okay, in my past life I did deal with the criminal class quite a bit.

The lawyers twist the system in favor of the criminal class.

Presumably people with their eyes too close together are all members of the criminal classes.

There's no longer a thing called a criminal class.

And, for another, they're apt to have a lot more sense than the criminal classes.

He has necessary knowledge that most members of the criminal class do not.