Desconhecido: I was born in a favela.
Desconhecido: I know what a 16-year-old delinquent is capable of doing.
Therefore, in this deputy's mental construction, he associates the favela with a place where you can see what a delinquent can do.
Desconhecido: Did I make myself understood?
Desconhecido: That is to say, he reveals an elitist view.