I watched the Criminal Minds episode with the Roma Unsub of the week and. I don't even know what to say. I'd suggest using it as a general outline of what not to do when you're writing about oppressed minorities in general and Roma in general (actual line "they make their living off of petty theviery").
I would also suggest hitting all the writers involved with a hardback copy of Bury Me Standing as well.
EDIT:
a brief summary of the episode.