That is the sequel to
Tropa de Elite (2007), by the same director, Jose Padilha. I strongly recommend watching
Tropa de Elite first.
https://www.imdb.com/title/tt0861739/
The same director's documentary Bus 174 (2002) is even much more intense and unforgettable.
https://www.imdb.com/title/tt0340468/
He also created the amazing series The Mechanism (2018-), based on the Operation Car Wash investigations, during the last 10 years, into corruption in Brazil.
https://www.imdb.com/title/tt6873658/
https://en.wikipedia.org/wiki/Operation_Car_Wash