In August 2010 Palmer was chosen to chair a UN Inquiry panel into the fatal Israeli raid on the Mavi Marmara, a Turkish ship participating in a Gaza-bound protest flotilla in May of that year. The panel included the outgoing Colombian President Álvaro Uribe as the Vice-chair, and representatives from Turkey and Israel. The report, released on 2 September 2011, found that Israel's "naval blockade was imposed as a legitimate security measure in order to prevent weapons from entering Gaza by sea and its implementation complied with the requirements of international law," and that Israeli soldiers enforcing the blockade faced "organized and violent resistance from a group of passengers" when they boarded the ship. However, the report also found that the Israeli soldiers responded with "excessive and unreasonable" force and recommended that Israel make "an appropriate statement of regret" and pay compensation.