A pentito from the 'Ndrangheta who lived in Amstelveen, near Amsterdam, for a long time, Giuseppe T., played an important role in the investigation into the Italian mafia.

That is what the dutch tax police Fiod is aware of after reporting by De Telegraaf . "He mainly provided insight into the working methods of the organization and in the family ties," says a spokesperson. "He explained the methods of money laundering and drug trafficking, he could also name names and he recognized people from photographs."

On Wednesday, 84 people were arrested in several countries during an action against the mafia clan from Calabria. In the Netherlands, were arrested five persons .

In the Pollino investigation, the Amsterdam region played a supporting role. That was different in previous studies on the 'Ndrangheta. The Calabrese mafia organization turned out to have tentacles in the flower auction at Aalsmeer. That branch was busted in September 2015 in a study in which dozens of arrests were carried out in Italy and the Netherlands.