The Folha de S.Paulo has taken criticism for failing to follow up on its coverage of the Siemens cartel scandal.

It follows up today with an infographic-driven story that advances the plot somewhat, with the introduction of a fresh levy of documents. Other major news organizations continue to lay off the story.

German multinational Siemens has presented Brazilian officials with documents in which it affirms that the government of São Paulo knew of and gave its official guarantee to the formation of a cartel in auctions for railway projects in the state.

The negotiation with representatives of the states, Siemens said, is represented in “diaries” which the company delivered to Cade, the antitrust authority.

Last month, the engineering giant blew the whistle on  the existence of a cartel — in which it took part — for the purchase of railway equipment and the construction and maintenance of commuter rail…