The SVU crew looked into crimes against the Romani community, as seen here, on the episode "Lost Traveler."
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Richard Belzer has been a mainstay on SVU for years. He plays John Munch, of course.
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Law & Order: SVU Season 13 Episode 9 Quotes

You're in trouble; your partner's pretty and smart.

Brooklyn Detective Dumas

So you're not a scumbag trying to scoop the competition on a milk carton case. You are one of the good guys.

Munch