While the detail of the investigations has not been made public, it is clear that 13 people have been indicted, of which four are businessmen. Politicians may be implicated, too.
Investigations, which first started in the Port of Vitória in 2009, have so far led to six cases being sent to the Federal Court in Rio and Espirito Santo.
These involve auditors being asked to delete information from a database, the deliberate falsification of information and turning a blind eye in respect of the importation of explosives.
All of the companies implicated in the various prosecutions deny any illegal activity took place.