Hi Drebs, I've some links about that, not sure if exactly what are you looking for but it worth to share and have a look on it:
1. internetlab.org.br did this report some months ago about surveillance, marco civil and the new BR law which allow gov to spy people just assuming they are terrorists:
http://www.internetlab.org.br/wp-content/uploads/2017/05/Vigilancia_sobre_as...
2. Report from art19 about how gov violating the freedom of expression "Violações à Liberdade de Expressão" in BR
LINK: http://artigo19.org/?p=11496
3. Art19 Showing the 5 year analysis of open information access and how this affect Human Rights Defenders (example: no info about abortion, agrotoxicos and dirtlist about slaves contemporary work in BR)
LINK: http://artigo19.org/?p=11599
I know there's more, as situation here is getting hot.. ..so please, if you all know more feel free to share it!
byez