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This contribution deals with Regional Intervention Groups ( groups d’intervention régionaux: GIR) comprised of police officers, tax auditors, customs officers and labor market fraud inspectors. Created in 2002, GIRs have certainly become a central tool of political communication for the Minister of the Interior. But this article analyzes instead the barriers that have often prevented judicial cooperation, generated tensions and intensified conflicts of jurisdiction. Finally, we show how GIRs have refocused their mission to tackle “criminal patrimonies”, thereby creating a new intersectorality from below that has developed greater distance from the highly politicized mandate they were initially given. This shift stems firstly from the reluctance of key administrators to have their activity reshaped for political goals and, secondly, from the solidarity that has developed between GIR members who have progressively reorientated their partnership based upon their own rules.