Scumbags. All rats have their justifications I pay them no mind. I gave Previte some credit for basically admitting he is a self serving scumbag.
But these scumbags are useful for honest citizens. It's a good thing there is no "honor" among criminals and therefore the law enforcement can use rats to put more criminals in jail. If all criminals were true to their so-called "code of honor" and nobody informed on accomplices, life for honest people would be a hell of worst sort.