Italian slang - how do you call someone a snitch?

[psychopeg]

Hi there! Quick little detail: I have an arms deal going bad, between two parties, both of whom are Italian. I had a lot of luck looking up general insults that will be super useful, but I'd like the baddie to accuse my MC of being a "snitch." I don't necessarily want a direct translation; I'd like something that carries the same negative connotation. Help?

terms searched: Italian insults, Italian snitch, How do you call someone a snitch in Italian? (desperation, that last one... and so, Little Details crew, I turn to you...)

Thanks!