http://www.bbc.co.uk/news/world-latin-america-39311336
http://www.reuters.com/article/us-brazil-corruption-food-idUSKBN16R1MH
Brazil meat-packing giants 'exported rotten beef'
"They accuse more than 30 companies of a number of unhygienic practices. Among them are JBS, the world's largest beef exporter, and BRF, the world's top poultry producer."
"They used acid and other chemicals to mask the aspect of the product. In some cases, the products used were carcinogenic," the police said.
In other cases, potato, water and even cardboard paper was mixed with chicken meat to increase profits."
after 2 year investigation ..