Soundtrack from the movie Sin Nombre (Without Name), a Spanish-language film about, in a nutshell, Mara Salvatrucha. Which is a Central American gang. It's also about immigration. The director spent almost two years researching and spending time with MS gang members, as well as riding on top of trains with immigrants.
The movie is fantastic, so i recommend you watch it.
The soundtrack is also very good. Stylistically it reminds me a lot of Clint Mansell (The Fountain, Requiem for a Dream). Except, of course, a lot more Latin-influenced.