In August 2014 after it was reported that Landrieu violated federal law by using taxpayer dollars to charter at least four private flights to campaign events Landrieu announced that she had ordered an internal investigation into all of her flights during her time in the Senate. In September 2014, Landrieu revealed that the internal investigation into her flights had concluded that since she had entered the Senate she had improperly charged her Senate office $33,700 for private flights to campaign events. Landrieu originally said the charter company mistakenly billed Landrieu's Senate office instead of her re-election campaign.