Complex sentence: The release of the documents triggered international outrage and spawned an investigation by EULEX into the trafficking, this was criticized by Marty who believed that an independent organisation rather than EULEX should look into the crimes.
Split into simpler sentences: The release of the documents triggered international outrage and spawned an investigation by EULEX into the trafficking. This investigation was criticized by Marty who believed that an independent organization rather than EULEX should look into the crimes.