We learned the language with the help of a native 'informant'.
The police were alerted to the plot by a paid 'informant'.
(..) Aren't you disgusting, Coccioli? But I'm doing my best. You've come to make inquiries about the case which I no longer control.. How so? - Perez was my informant. - Really? I knew him two years. He was quite a curious person. This Perez was an honest worker by day, (..)1981 To Kill a Cop
(..) Oh, damn it! You're now going to tell me about Perez and everything else. No... damn it Choucas. I don't... I'm all ears, Coccioli. Perez was an informant. I think you already know that. He was killed most likely on Sunday or Monday morning. Stop it, Choucas! That's right Choucas stop it! (..)1981 To Kill a Cop