Here's a link to a video showing an exhibit, "Art Predators and The Rediscovered Heritage .. the story of recovery", at the National Etruscan Museum at Villa Giulia in Rome (September 29 through December 15, 2012) of recovered stolen antiquity objects recovered by Italy's Carabinieri Department for the Protection of Cultural Heritage (Carabinieri Tutela Patrimonio Culturale), the Justice Department, and archaeologists in an investigation lasting more than two decades.
The Villa Giulia-Museo Nazionale Etrusco is located north of the Piazza del Popolo in the western outskirts of the Villa Borghese (a really long walk from the Galleria Borghese as I once found out).
These hundreds of works of art were stolen by grave robbers in clandestine excavations in Etruria, Puglia, Sicily and Calabria (Google Translation of article by Irene Buscemi, "Predatori d'arte e patrimonio ritrovato in mostra a Roma", September 30, 2012, Il Fatto Quotidiano). These amphora, kylix (pottery drinking cups) and bronzes were illegally sold in the 1970s and 1980s by merchants and traffickers to famous foreign museums (Getty Museum in Los Angeles, The Metropolitan in New York, and institutions in Australia and Japan). Two archaeologists, Daniela Rizzo and Maurizio Pellegrini, assisted in the project and curated the exhibit. Many of these objects were seized from a warehouse in the Free Port of Geneva in 1995 (for more information you may refer to "The Medici Conspiracy" (Public Affairs, 2006) by historian Peter Watson and Italian journalist Cecilia Todeschini). The Carabinieri used polaroid photographs, charts, and documents found in this investigation to recreate the illicit trade that funneled objects through art collectors and auctions houses such as Sotheby's in London.
Here's a link to the exhibit at the Villa Giulia. The exhibitors explain here that for the first time the National Etruscan Museum of the Villa Giulia is presenting some archaeological materials chosen from among 3,000 artifacts seized in 1995 by the Carabinieri Cultural Heritage Projection from the Free Port of Geneva and returned to Italy after a long legal battle based upon documents found in the raid that allowed the Carabinieri and prosecutors to reconstruct the trafficking routes and illegal excavations. In this illegal operation, objects were illegal dug up out of the ground, moved from Italy to Switzerland, cleaned and then provided paperwork to market the objects to international museums:
The exhibition aims to raise awareness of the general public the hard work done in recent years by the Judiciary, flanked by Carabinieri Cultural Heritage Protection, with the Guardia di Finanza and the archaeologists of the Superintendent [Soprintendenza per i Beni Archeologici dell'Etruria meridionale], which has led to some important results, perceived not only through a high number of artifacts recovered, by especially in the significant drop in illegal excavations at the archaeological sites of Cerveteri, Vulci, and Tarquinia, once the subject of real raids [translated with the help of Google].