Complex sentence: The Audiencia Nacional, given the ongoing collaboration between Spanish and French courts, decided not to extradite Falciani because he had provided information indicative of "severely irregular" suspicious activity, and of illegal and criminal offenses.
Split into simpler sentences: The Audiencia Nacional, given the ongoing collaboration between Spanish and French courts. The decision not to extradite Falciani was made because he provided information indicative of "severely irregular" suspicious activity, and of illegal and criminal offenses.